EN - RUNNER'S GUIDE ULTRA-TRAIL SNOWDONIA BY UTMB 2025
16 TO 18 MAY 2025
CONTENTS
Welcome | 3 - 5
UTMB World Series | 6 - 9 Runner’s Commitment | 10
Event Schedule | 12 - 13
Ultra - Trail Village + Map | 15 - 20
Event Venue Map | 22
Travel and Parking | 23 - 24
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HAYDEN ARROWSMITH EVENT DIRECTOR
As Event Director for Ultra-Trail Snowdonia by UTMB, I extend a warm welcome to each of you embarking on this incredible journey through the northern mountains of Eryri (Snowdonia) UTS is more than a test of physical endurance – it’s an immersion into the raw beauty and challenging terrain of this mythical land You’ll traverse rugged mountains, navigate winding trails and witness stunning views (if the clouds keep away!) which will stay with you long after you’ve crossed the finish line
Your race will demand resilience, determination and a deep respect for the natural environment We are privileged to experience this landscape, and with this privilege comes responsibility from us as individuals and collectively as runners.
Respect our environment
It’s vital we minimize our impact on this fragile ecosystem Please stay on the trails, do not venture from the marked path, be mindful of the flora and fauna, and take all your trash with you Eryri is home to a diverse array of wildlife and livestock – we are the temporary visitors in their homes Nature needs our respect Let’s preserve the beauty for all future visitors and explorers. Any participant found disregarding these principles will be penalised
A heartfelt thank you
UTS would not be possible without the incredible support of the local communities. Their generosity and enthusiasm are fundamental to this event From landowners granting us access to the stunning trails, to the local businesses providing essential services, we are deeply grateful
I also want to express my sincere gratitude to our amazing Event Team of volunteers. These dedicated individuals will be working tirelessly to ensure your enjoyment and safety, providing support along the routes, and creating a welcoming atmosphere. Their passion and commitment are truly inspiring Please show them your appreciation as you encounter and interact with them during your race
Final preparations
In the following pages of this guide you will find all the essential information you need for a successful and safe race. Please take the time to familiarise yourself with your race timings, aid station information, race rules and general safety guidance
Remember, this is not just a race against others, but a competition against yourself. Embrace the challenge, support your fellow trail runners and enjoy every moment of this extraordinary adventure
We look forward to seeing you on the start line!
CROESO!
HAYDEN ARROWSMITH EVENT DIRECTOR
Fel Cyfarwyddwr Digwyddiadau Ultra-Trail Snowdonia gan
UTMB, croeso cynnes i bob un ohonoch sy'n cychwyn ar y daith anhygoel hon drwy fynyddoedd Eryri. Mae UTS yn fwy na phrawf dygnwch corfforol - mae'n trochi i harddwch amrwd a thir heriol y wlad chwedlonol hon. Byddwch yn croesi mynyddoedd garw, yn llywio llwybrau troellog ac yn dyst i olygfeydd godidog a fydd yn aros gyda chi ymhell ar ôl i chi groesi'r llinell derfyn.
Bydd eich gwydnwch, dyfarniad a pharch at yr amgylchedd naturiol yn diffinio eich ras, ac mae'n fraint i brofi'r dirwedd hon, a chyda'r fraint hon daw cyfrifoldeb gan bob un ohonom a gyda'n gilydd.
Parchu ein hamgylchedd
Mae'n hanfodol ein bod yn lleihau ein heffaith ar yr ecosystem fregus hon. Arhoswch ar y llwybrau, peidiwch â mentro o'r llwybr marciedig, byddwch yn ymwybodol o’ch amgylchiadau, ac ewch a’ch holl sbwriel gyda chi. Mae Eryri yn gartref i amrywiaeth amrywiol o fywyd gwyllt a da byw –ni yw'r ymwelwyr dros dro yn eu cartrefi Gadewch i ni gadw'r harddwch ar gyfer yr holl ymwelwyr a fforwyr yn y dyfodol. Bydd unrhyw gyfranogwr sy'n cael ei ganfod yn anwybyddu'r egwyddorion hyn yn cael ei gosbi
Diolch o galon
Ni fyddai UTS yn bosibl heb gefnogaeth anhygoel y cymunedau lleol. Mae eu haelioni a'u brwdfrydedd yn sylfaenol i'r digwyddiad hwn. O dirfeddianwyr sy'n rhoi mynediad i ni i'r llwybrau trawiadol, i'r busnesau lleol sy'n darparu gwasanaethau hanfodol, rydym yn ddiolchgar iawn.
Rwyf hefyd eisiau mynegi diolch diffuant i'n Tîm Digwyddiad anhygoel o wirfoddolwyr Bydd yr unigolion ymroddedig hyn yn gweithio'n ddiflino i sicrhau eich mwynhad a'ch diogelwch, gan ddarparu cefnogaeth ar hyd y llwybrau, a chreu awyrgylch groesawgar. Mae eu hangerdd a'u hymrwymiad yn wirioneddol ysbrydoledig Dangoswch eich gwerthfawrogiad iddynt wrth i chi ddod ar draws a rhyngweithio â nhw yn ystod eich ras.
Paratoadau terfynol
Yn y tudalennau canlynol o'r canllaw hwn fe welwch yr holl wybodaeth hanfodol sydd ei hangen arnoch ar gyfer ras lwyddiannus a diogel. Cymerwch yr amser i ymgyfarwyddo â'ch amseroedd ras, gwybodaeth am orsafoedd cymorth, rheolau ras a chanllawiau diogelwch cyffredinol.
Cofiwch, nid ras yn erbyn eraill yn unig yw hon, ond cystadleuaeth yn erbyn eich hun. Cofleidio'r her, cefnogwch eich cyd-redwyr llwybr a mwynhewch bob eiliad o'r antur anhygoel hon.
Edrychwn ymlaen at eich gweld chi ar y llinell gychwyn!
CROESO TO LLANBERIS
GWILYM EVANS
CYNGOR GWYNEDD COUNCILLOR
FOR LLANBERIS & NANT PERIS
GOOD LUCK
TO ALL RUNNERS
Croeso to Llanberis, here in Eryri You’ll be in awe at the breathtaking views as you enjoy this competition.
As the local Gwynedd Councillor for Llanberis, a lad born and bred here, I am proud to welcome athletes from across the world to Llanberis. No doubt, the local community also wish you the best of luck whilst participating in this iconic UTMB event.
One important message is for you to keep safe and well as you take part in this event. The rocky terrain and footpaths of Yr Wyddfa are not for the faint hearted – please take care
You will see a number of successful local businesses here in the village, where local food and drinks are served. Our shops support family run businesses, plus in and around the village the Welsh signs in ‘Cymraeg’ give you a flavour of our heritage, culture and language. Enjoy your experience whilst supporting our community and respecting our locality.
We look forward to congratulating you as you cross the finishing line amongst family and friends!
Do enjoy the weekend here with us in Llanberis, Gwynedd
PHOB LWC, RHEDWYR!
Croeso i Lanberis, yma yn Eryri. Byddwch yn wirioneddol rhyfeddu ar y golygfeydd syfrdanol wrth i chi fwynhau’r gystadleuaeth hon.
Fel Cynghorydd lleol Gwynedd Llanberis, wedi fy magu yma, rwy’n hynod o falch o groesawu athletwyr o bob cornel o’r byd i Lanberis Mae’r gymuned yn dymuno pob dymuniad da i chi wrth i chi gymryd rhan yn y digwyddiad eiconig UTNMB.
Un neges bwysig yw i chi gadw’n ddiogel ac yn iach wrth i chi gymryd rhan yn y digwyddiad hwn Mae’r tir yn greigiog a’r llwybrau troed yn fregus, byddwch yn ofalus
Fe welwch nifer o fusnesau lleol llwyddiannus yma yn y pentref, sy’ darparu gwledd o fwyd a diod leol. Mae ein siopau yn cefnogi busnesau teuluol, ac mae’r arwyddion Cymraeg yn dynodi blas ar ein treftadaeth, ein diwylliant a’n hiaith Mwynhewch eich profiad wrth gefnogi ein cymuned a pharchu ein hardal!
Edrychwn ymlaen at eich llongyfarch wrth i chi groesi’r llinell derfyn ymhlith teulu a ffrindiau!
Mwynhewch y penwythnos yma gyda ni yn Llanberis, Gwynedd.
TO PARTICIPATE IN ULTRA -TRAIL SNOWDONIA BY UTMB IT IS ESSENTIAL YOU ARE COMMITTED TO THE FOLLOWING
§ To be completely aware of the length and specificity of the event and to be perfectly prepared for it.
§ To have acquired, previous to the race, a genuine capacity for personal autonomy in the mountains allowing for the management of challenges and difficulties expected by this type of event, and notably:
§ Know how to confront, without outside help, climatic conditions which could be very difficult to deal with at altitude (darkness, wind, cold, heat, fog, rain or snow)
§ Know how to manage, including when you are isolated, the physical or mental problems arising from a great fatigue, digestive problems, muscle or articular pains, small wounds, etc.
§ To be fully aware the organisation’s role is not to help a runner manage these problems.
§ To be fully aware for such an activity in the mountains, security depends on the runner’s capacity to adapt to these problems encountered or foreseen
§ To respect the nature, animals, people and communities of Eryri (Snowdonia), and to inform their spectators and supporters of the need to demonstrate this respect at all times
§ To respect the rules and regulations of the race
EVENT SCHEDULE
FRIDAY 16 MAY
08:00 – 12:45
UTS 100M and UTS 100K mandatory kit check and race bib collection Registration Marquee
08:00 – 12:45 UTS 100M and UTS 100K drop-bag ‘drop off’ available Bag Drop Marquee
08:00 – 20:00 Ultra-Trail Village exhibitors and official UTMB merchandise open Cae'r Ddôl Event Field
13:00 UTS 100M race start Cae'r Ddôl Event Field
15:00 Suunto x Näak x POWERUP Shake-Out Run Suunto Booth – Ultra-Trail Village
DISCOVER WHAT’S NEW IN TRAIL RUNNING AND PARTICIPATE IN SOME OF THE VILLAGE ACTIVITIES!
Organised in the heart of Llanberis, we invite all trail runners, their families and friends to explore the Ultra - Trail Village Featuring the impressive UTS start and finish line, this is vibrant hub for all trail-running enthusiasts! See our World Series partners, chat to national brands, test products, get involved in our community runs, and sample some local food all gathered in one energising and animated outdoor space We’ll also be hosting Snowdonia Gear Repair, Pair Ups and Trash Free Trails to resonate with your love for the great outdoors and provide some sustainability initiatives to inspire us to protect the trails we cherish.
Think of the Ultra-Trail Village as the perfect post-race refuel and recharge venue for both your body and mind. Connect with fellow trail runners, celebrate your achievements, and treat your tastebuds to delicious local eats while supporting our local businesses. Features include:
• Registration marquee for your mandatory kit check and race bib collection
• UTMB World Series official merchandise
• UTMB World Series partners
• Running and lifestyle exhibitors
• Sustainability stands to repair your kit to last a bit longer
• Local food and drink vendors
REUSE, REPAIR & RECYCLE
At this year’s Ultra - Trail Village , we have partnered with a number of businesses who are all promoting and encouraging you to reuse, repair and recycle your shoes and kit.
PAIR UPS
Pair Ups will be offering you the chance to repair your trainer uppers FREE OF CHARGE to all runners and supporters (while supplies last).
Head to the Pair Ups tent, leave your shoes and pick them up when they’re fixed on the Friday, Saturday or Sunday. If you’d like to leave them for longer, then all they ask for is just the return postage and packaging (P&P) to send them back to your home
SNOWDONIA GEAR REPAIR
The Snowdonia Gear Repair team will be available for in - person - on - the - day repairs to all runners and supporters and will include repairs such as:
• Heat Patches - £18
• Zip Slider Replacements – From £18
• Hand Stitching – From £10
• Seam Taping (per ½ metre) – £20
Larger repair jobs are also available where items can be left and posted back This includes repairs to waterproof jackets, insulated down jackets, running vests and backpacks.
THE SNOWDONIA SOCIETY
In 2025, UTS have offered runners the opportunity to run for a good cause and raise funds to support a local charity with a direct impact on our host mountain range – The Snowdonia Society
The Snowdonia Society / Cymdeithas Eryri works to ensure that Snowdonia / Eryri is well-protected, well-managed and enjoyed by all through practical conservation and campaigning.
Thank you to our Charity Bib participants who have helped raise £3,000 which will be invested into protecting the Snowdonia / Eryri landscape
TREES NOT TEES
We are once again partnering with Trees Not Tees for the 2025 edition of UTS to offer an alternative to your event t-shirt welcome gift.
A big thank you to each participant who decided to plant a tree. Collectively you will have planted nearly 400 trees to help tackle the climate crisis
If you chose your event t-shirt, but still want to plant a tree as well, head over to https://treesnottees.com/ for more information including how to sponsor a tree.
JOGON
Do you have any unwanted running shoes that are past the state of repair? Then drop off your unwanted shoes (pair them up and tie them together with the laces) in the designated Jogon boxes that will be near the Registration Marquee in the Ultra-Trail Village
Jogon are doing great work and campaigning to remove 1 million shoes from landfill With your help we can help them!
TRASH FREE TRAILS
We are pleased to welcome Trash Free Trails who will be activating from their stand in the village. With close links to Snowdonia Society and Plastic Free Yr Wyddfa, they are on a mission to help to reduce single-use pollution (SUP) from the trails.
Meet the team to find out more on how you can help to keep the trails clean and get involved in the TFT activations during the weekend!
2025 UTMB WORLD SERIES PARTNERS:
GPS Watch & Technical Partner
Official Compression Apparel Supplier
Sports Travel, Accommodation & Logistics Supplier
ULTRA -TRAIL VILLAGE EXHIBITORS:
Altra – Running f ootwear
Camelbak – Running hydration packs and bottles
Crib Goch Outdoor – Running and outdoor r etailer
Fenixlight - Headtorches
Leki – Running p oles
Llanberis Mountain Rescue – Local Mountain Rescue Team
Oleus – Sports performance shots
Oofos – Recovery f ootwear
Pair Ups – Shoe upper repairs
Snowdonia Gear Repair – Apparel repairs
The North Face – Running apparel and footwear
Trailskin – Anti - chafe and blister products
Technical Sports Nutrition & Hydration Partner
Official Headphone Supplier
Trash Free Trails – Not for profit organisation to protect our trails
ULTRA -TRAIL VILLAGE CATERING AND DRINKS VENDORS:
Burger Bay – local Welsh beef and l amb burgers
Coffee Bay – local coffees and hot drinks
Georgio’s – p asta , homemade ice creams and desserts (V) & (VE) & (GF)
Pizza Llun – delicious pizzas (V )
Swig Smoothies – tasty, healthy and nutritious smoothies
Dragon Roastery – local coffees and hot drinks (available at Bron - y - Fedw spectator zone)
SNOWDONIA ERYRI
Suunto x Naak x POWERUP Shakeout Run – Friday 16 May 15:00
Join the team for a 5k pre-race shakeout run before the Ultra-Trail Snowdonia races!
We are bringing together the community, in partnership with Suunto, Naak and the POWERUP run crew to ensure the vibes are high and you are prepped for your race There will be sample products from Suunto and Naak, with some freebies also up for grabs!
Whether you're running UTS, spectating, or are local, there's no need to be a seasoned trail runnerthis run is for EVERYONE So lace up your shoes, grab your friends, and let's hit the trails together!
Sign up - https://www.eventbrite.com/e/suunto-x-naak-x-powerup-ultra-trail-snowdonia-by-utmbshakeout-run-tickets-1323516175509?aff=oddtdtcreator
SUUNTO X UTMB WORLD SERIES
EVENT VENUE MAP
PARKING
TRAVEL AND PARKING
Llanberis, the host village for Ultra-Trail Snowdonia, can be a very popular tourist destination during the spring and summer months If you are travelling to the event by car, it’s important to plan your parking options in advance to help your experience run smoothly.
To ensure a smooth and enjoyable experience for everyone, and to minimise the disruption for residents of Llanberis, we kindly request all participants use the official event car parks and shuttle buses.
Prior to booking your official car parking, please consider:
• Using public transport to travel to Snowdonia and Llanberis.
• Car sharing with other participants travelling from near your home town Why not ask on the Ultra-Trail Snowdonia Runners Facebook group?
For participants staying in Llanberis, please consider leaving your vehicle at your accommodation and walking to the race start The Ultra-Trail Village is conveniently located within the centre of Llanberis.
Do not park in any residential area at any time during your visit and do not block access for residential properties or businesses Please only use designated car parking areas
3-DAY CAR PARK PASS
Official car parking on the north of Llanberis (off the A4086), 1.5km from the village centre, including a return shuttle bus service to the Ultra-Trail Village for your race bib collection and race start Ideal car parking for UTS 100M and UTS 100K participants
A 3 - Day Car Park Pass is £45.00 for all three event days (Friday, Saturday and Sunday) and will allow for overnight parking (unlike the pay-and-display car parks in Llanberis) Price is subject to an additional 8% booking fee.
There will be a free return shuttle bus service from near the car park to the Ultra - Trail Village for your race registration and race start To help plan your arrival, and ensure you reach the start line before your race, the shuttle bus timetable is listed below.
For safety reasons, you will not be permitted to sleep in your vehicle overnight
There are 6 electric car charging points and toilets (no showers) available in this car park.
This car park will be open from 07 : 00 on Friday 16 May and close at 16 : 00 on Sunday 18 May 2025 .
TRAVEL AND PARKING
WEEKEND CAR PARK PASS
We also have weekend car parking off the A55 near Bangor, ideal for UTS 50K and ERYRI 25K participants
A Weekend Car Park Pass is £30 00 for the weekend (Saturday and Sunday) and will allow for overnight parking (unlike the pay-and-display car parks in Llanberis) Price is subject to an additional 8% booking fee.
There will be a free return shuttle bus service from near the car park to Ultra-Trail Village for your race registration and race start To help plan your arrival, and ensure you reach the start line before your race, the shuttle bus timetable is listed below.
For safety reasons, you will not be permitted to sleep in your vehicle overnight
There are toilets (no showers) available at this car park.
The car park will be open from 06 : 00 on Saturday 17 May and close at 16 : 00 on Sunday 18 May 2025 .
Once you have checked into the car park you will be issued with a vehicle pass which will allow you to enter the car park at multiple times throughout the event weekend
Spaces for this both the 3 - Day Car Park Pass and Weekend Car Park Pass are limited To secure space for your vehicle, please visit your MyUTMB account and click 'edit registration' to book your Car Park Pass online. Car Park Passes are non-refundable.
We recommend spectators visiting for the day make use of the pay-and-display car parks in the village. Daily prices vary. We recommend you check the car park terms and conditions before you park.
GREATER FEMALE PARTICIPATION
RACE MEASURES WE IMPLEMENT FOR OUR FEMALE PARTICIPANTS
We believe a women’s place is on the start line and at Ultra-Trail Snowdonia by UTMB we are actively including and encouraging greater female participation at the event There are passionate communities of female trail runners across the UK who would excel at and enjoy UTS, but sadly our statistics are still far from representational of the UK running community. We are a long way from an equal showing of both women and men on our start lines
We acknowledge there is still plenty of work to be done, to share and promote the power and joy of trail running at our events Where possible we incorporate industry best practice across UTS to ensure our female participants are welcomed and supported, such as following and incorporating Race Guidelines published and encouraged by SheRACES
LEVEL THE START LINE
• We use inclusive imagery (men / women / under-represented groups) within our event day coverage and on our website and social media throughout the year.
• We have started hosting women focused online webinars and Q&A sessions to provide women with the opportunity to ask questions and talk to other experienced female participants before they decide to enter or as they plan and prepare for their race.
• We have a pregnancy deferral policy for female participants who are pregnant, or participants with a pregnant partner, or participants adopting or birthing via surrogacy.
EQUAL THE EXPERIENCE
• There are female toilets , and non-gendered toilets, at the start, finish and at each aid station within our races. We provide sanitary and period products in some toilets – just look for the sign on the door –and within all aid stations
• We acknowledge the importance of female safety and all our aid stations are staffed with a mixture of male and female volunteers.
• Our Ultra-Trail Snowdonia event t-shirts (selected when you registered) are available in women’s specific sizes
RESPECT OUR COMPETITION
• Equal coverage and airtime is given to both the men’s and women’s races on social media on race day
• Our media staff are provided with gender and diversity guidance to a create wide selection of images
• Winners in both the men’s and women’s races receive the same prizes and prize money (if applicable) .
• Women are encouraged to the front of each wave, and men and women are asked to stand to the left/right respectively to allow better visibility as well as more room to race .
AID STATION INFORMATION
AID STATIONS
Along each of the race routes there are specific locations where runners can get food and drinks supplies , take shelter and have some time out from the race. These aid stations provide basic food and drink for consuming while you stop and catch your breath, plus important toilet facilities too
Your elapsed race time continues while you are at an aid station. Each aid station has a specific cut-off time which you need to avoid if you wish to continue in the race.
At UTS we supply drinking water, Coca-Cola and energy drink mixes for filling your water bottles or hydration packs. If you want to drink these straight from the serving container you’ll need to use your personal reusable cup (part of the mandatory kit list for the UTS 100M, UTS 100K and UTS 50K races)
Undertaking a race such as UTS assumes a level of autonomy and self - sufficiency with respect to your own fuelling and hydration While the event provides supplies at aid station, these are to supplement your own nutrition and planning. You should not be over-reliant on the food and drinks at aid stations.
Every runner must make sure, when leaving the aid station, they have the necessary quantity of snacks and fluids to keep them going until the next aid station .
AID STATION INFORMATION
WHAT’S ON THE MENU?
There are three types of aid station along the race routes Please refer to each of the race route profiles on the UTS website for more information, including what type of aid station is at each location.
DRINKS ONLY
This is the first aid station on all routes and offers: Drinking water, Näak Energy drink mix, orange squash and Coca-Cola.
FOOD AND DRINK
In addition to the above drinks, these aid stations also offer: Hot drinks (tea / coffee / hot chocolate) and biscuits. Sandwiches (white bread, wholemeal bread, gluten free bread, cheese, pickle, peanut butter, raspberry jam), crisps, peanuts, fruit (bananas, oranges)
HOT FOOD
In addition to the above, these aid stations also offer: Pasta and tomato sauce (Capel Curig), vegan curry (Croesor) and pizza (Rhyd Ddu) Rice pudding and custard will be available at hot food aid stations. If you want to enjoy hot food, you MUST bring your own bowl or plate These will not be provided
Please note : these options are correct at the time of publication. All food options are subject to change.
TYPES OF NAÄK PRODUCTS ON EACH RACE ROUTE / FINISH
AID STATION INFORMATION
NÄAK ENERGY DRINKS MIX CONCENTRATION
As our UTMB World Series technical partner for sports hydration and nutrition, Näak Energy will be available at all aid stations on each Ultra-Trail Snowdonia race and the finish line in Llanberis
We implement a standardised concentration of Näak Energy drink mix at aid stations which will be served based on the following preparation instructions: 720 g of Näak Energy drink mix per 5 litres of water .
This is equivalent to one Näak Energy single serving sachet (72g / 250 calories) mixed with 500ml of water
SANITARY PRODUCTS FOR PARTICIPANTS
Alongside general toilets we also provide women only toilets at the start, at aid stations and at the finish of each race, where toilet facilities are available. Women’s toilets will be identified with signs on the door We ask everyone at UTS to be respectful of these toilet facilities and the needs of your fellow participants Please do not use a women only toilet if they do not apply to you.
Period products will be available at all aid stations and the Info Point in the Ultra-Trail Village Please ask a volunteer at the aid station if you are not able to locate any period products, or they need replenishing.
AID STATION INFORMATION
PERSONAL ASSISTANT ‘SUPPORT’ – UTS 100M AND UTS 100K
A personal assistant (also known as ‘support crew’) is only permitted at specific aid stations. The locations where a personal assistant can support a runner are detailed on the profile of each race on the UTS website.
§ Pen - y - Pass – ✘ NO ASSISTANCE PERMITTED
§ Glan Dena – ✔ ASSISTANCE PERMITTED
§ Llyn Eigiau – ✘ NO ASSISTANCE PERMITTED
§ Capel Curig – ✘ NO ASSISTANCE PERMITTED (UTS 100K drop bag location)
§ Rhyd - Ddu (Outdoor Centre) – ✔ ASSISTANCE PERMITTED (UTS 100M ONLY)
§ Bron - y - Fedw ( Uchaf Farm) – ✔ ASSISTANCE PERMITTED
§ Betws Garmon – ✘ NO ASSISTANCE PERMITTED
You must only be assisted by one person at one time and only in the aid station areas designated for this purpose. UTS 100M and UTS 100K participants may ask for 1 x ‘Support Crew’ wristband to go in your registration pack after you have completed your mandatory kit check. You must ask for a ‘Support Crew’ wristband – they will not automatically be given to you
This wristband allows your personal assistant access into the aid station with one bag of MAXIMUM 30 litre capacity . Anyone attempting to enter an aid station without a ‘Support Crew’ wristband will be refused access and asked to leave the venue
A person without a wristband who continues to force entry at an aid station, or arrives at an aid station where there is no assistance permitted and attempts to provide support to a participant, may incur a penalty on their participant
No additional “media” access or requests will be granted to any participants other than the 1 x ‘Support Crew’ wristband. Only official members of the UTS Event Media Team with appropriate media accreditation passes will be allowed to enter aid stations
THERE IS STRICTLY NO PERSONAL ASSISTAN CE ALLOWED AT UTS 50 K OR ERYRI 25 K AID STATIONS
AS03 ON UTS 100M AND UTS 100K
CONFIRMATION OF AS03 ON UTS 100M & UTS 100K ROUTE
For our participants in the UTS 100M and UTS 100K; the route through the Carneddau mountain range has been adjusted.
The route takes a different trail used during previous editions of UTS.
Please be aware that due to access restrictions and recent localised farming conditions, the route will no longer descend from Carnedd Llewelyn towards Pen yr Helgi Du. The course will instead venture into Cwm Eigiau valley for a unique experience.
While we understand this may cause some inconvenience and difference to your training, we’re excited to bring this new section of the route to you!
After travelling north from Carnedd Llewelyn to Foel Grach, participants will descend into the remote and unspoilt Cwm Eigiau valley to Llyn Eigiau, passing the local Carneddau ponies which graze in this area along the way.
The route change has minimal impact on the overall race distance.
Aid Station 3 will be located at Llyn Eigiau, one of the most remote parts of the whole course.
The aid station will provide participants with basic drinks including Coca-Cola, Näak Energy drink mix and a variety of snacks to fuel you towards Capel Curig and Aid Station 4.
Toilets and shelter will be available at Llyn Eigiau.
Please see the updated route profile on the website for the change in route details as well as the aid station location.
UTS 100M AND UTS 100K CUT OFFS
CHANGES TO UTS 100M AND UTS 100K CUT OFFS
As part of our continuous efforts to make UTS one of the best ultra-trail running experiences in the UK, following a review of the course we have adjusted some cut-off timings in both the UTS 100M and UTS 100K
These adjustments apply to the earlier sections of the routes. The adjustments reflect the technicality of the course and the average pace required for these specific sections.
These adjustments do not reduce the difficulty and challenge of each race. The overall cut-off for each competition remains the same. All participants are expected to remain committed to personal autonomy in the mountains and be aware of the timings and pace required to continue in their race.
AS 01
Pen - y - Pass
A S 02
Glan Dena
AS 03
Llyn Eigiau
AS 04 Capel Curig
AS 06 Blaenau Ffestiniog
DROP BAGS
DROP BAGS FOR UTS 100M AND UTS 100K
UTS 100M and UTS 100K participants will receive a UTMB World Series drop - bag (a branded drawstring bag) with your race bib as part of your race registration pack at the event. The capacity of the drop-bag is approximately 30 litres This is the only bag which is permitted as a drop - bag
After using the bag at the event, it can be reused at all UTMB World Series events They are designed to be reusable for multiple occasions If you already have a drop-bag from another UTMB World Series event, please bring this with you so it can be reused once more in Eryri (Snowdonia).
After filling your drop-bag with items of your choice (please remember; poles are not allowed in the drop-bag) you should take your drop-bag to the Bag Drop marquee in the Ultra-Trail Village This will be a short walk from the main Registration marquee. The Bag Drop marquee will be sign-posted and easily visible before you start your race If unsure, please ask a volunteer for directions.
Your drop-bag must be fastened closed with all items securely inside. Ensure your put your small race number card, found in your race pack, into the plastic window on the drop-bag before handing the bag to our volunteers.
UTS 100M PARTICIPANTS – drop bags will be transported to AS07 Croesor approx. 86km into the race.
UTS 100K PARTICIPANTS – drop bags will be transported to AS04 Capel Curig approx 51km into the race.
Once the aid station (where drop bags are available) has closed, the drop bags will be returned to Llanberis They will be available for collection from the same Bag Drop marquee in the Ultra-Trail Village For our faster runners, we unfortunately cannot guarantee your drop bag will arrive before you cross the finish line
The Bag Drop marquee will close at 15: 00 on Sunday (2 hours after the UTS 100M and UTS 100K cut-off time).
Drop bags must be collected at the event Any drop-bags which are not collected at the event will be treated as lost property and kept for seven days. Lost property will be sorted with any damaged, soiled or unusable items being appropriately disposed of
Any items which are clean and reuseable may be returned to the participant if the participant contacts UTMB within seven days using the Contact Form and agrees to arrange and cover the cost of postage. Lost property not claimed will be donated to charity or recycled as necessary.
DROP BAGS FOR UTS 50K AND ERYRI 25K
There is no drop bag facility on course for participants in the UTS 50K and ERYRI 25K competitions.
LEFT LUGGAGE AT FINISH
LEFT LUGGAGE SERVICE
For participants with exceptional circumstances (i.e. you are travelling solo and taking public transport to the event, or you will not have family or friends at the finish line in Llanberis) you will be able to leave 1 x small bag (MAXIMUM 30 litres) at the Bag Drop marquee within the Ultra-Trail Village.
This is primarily for a change of warm, dry clothes or any other essential items you may need after completing your race
This left luggage service is available to all participants.
However, we would strongly recommend participants who are expecting to meet family and friends at the finish to leave their change of clothes and essential items with them. We need to prioritise the left luggage service for participants who need it the most
Suitcases, holdalls or tents will not be accepted .
Unfortunately, we cannot accept large items in the Bag Drop marquee
SPECTATING ON THE RACES
SPECTATING – UTS 100M, UTS 100K AND UTS 50K
We know many of our participants will travel with friends and family who want to experience UTS as a spectator, specifically trying to catch a glimpse of their runner on the course There are many vantage points along the trails in Eryri where you can hike to get a good view of the action While we encourage you to enjoy spectating the race, please remember this is a competition and you should not interfere with the participants or offer any additional support other than encouragement, cheering and clapping!
Due to the remote locations of our aid stations, we must be very selective of which locations are suitable for spectators to gather outside. We are restricted by either road access, nearby residences, or simply a lack of space to accommodate anyone other than the runners themselves Below is a list of aid stations where you can, and where you must not, arrive to spectate If you arrive at an aid station where spectating is forbidden, you will be asked to leave and your participant may be penalised This creates a risk to the event, so please respect these instructions
Remember : spectators are not allowed into aid stations . You must always remain outside the venue
Do not drive into the aid station There is free car parking available on the village streets as you approach the pavilion You must not block access to any residential properties Please exit your vehicle quietly (if arriving and spectating after 22:00 and during the night).
Do not drive into the aid station. There is a public pay-and-display car park located 200m along the road
§ Bron - y - Fedw ( Uchaf Farm) postcode LL54 7YS – ✔ SPECTATING ALLOWED
There will be spectator car parking available in the large field near the aid station marquee Please follow the signage and instruction from volunteers Take care when entering and exiting the field onto the main road.
§ Betws Garmon – ✘ SPECTATING FORBIDDEN
THERE IS STRICTLY NO SPECTATING AT THE ERYRI 25K AID STATION
BRON Y FEDW SPECTATOR ZONE
Need a fantastic spot to cheer your runner amidst the stunning scenery of Eryri (Snowdonia)? Then join us at Bron-y-Fedw Uchaf Farm – home to our spectator zone for our ultra-trail race distances!
Located on the A4085 between Betws Garmon and Rhyd Ddu, the farm offers a dedicated spectator zone where you can relax, refuel and roar your support at your favourite runners as they complete the descent from Yr Wyddfa, the highest point on the course. UTS 100 M , UTS 100 K and UTS 50 K routes all pass this location with participants being able to stop at the aid station to replenish their food and drink supplies
Remember : only personal assistants (‘support crew’) with a wristband can enter the aid station
With ample car parking available, you can arrive with ease and find your spot near the marquee for a comfortable race viewing experience Why not grab a warm coffee or tasty treat from our local independent coffee shop, Dragon Roastery, who will be with us serving from 09 : 00 –21 : 00 on Saturday .
Bron-y-Fedw provide a brilliant vantage point to see your friends and family at this crucial part of their race, before they head into Beddgelert Forest and summit Mynydd Mawr and onwards to Betws Garmon.
• Official spectator zone – a comfortable and safe area to watch the race
• Coffee and refreshments – enjoy a warm drink and maybe a bite to eat from our local roastery.
• Free parking – park with us and help keep the narrow roads of Eryri free from obstructions
• Scenic views – take in the breathtaking beauty of Eryri from beneath Yr Wyddfa
• Ideal vantage points – the perfect location to catch your runner at a key point in the race
YOUR ARRIVAL AT REGISTRATION
REGISTRATION for all competitions takes place in the Registration marquee in the Ultra-Trail Village, located in Padarn Country Park, Llanberis.
RACE
REGISTRATION TIMES
UTS 100M Friday 08:00 – 12:45
UTS 100K Friday 08:00 – 12:45
UTS 50K Friday 16:00 – 22:00
ERYRI 25K Saturday 18:00 – 22:00
PLEASE NOTE: THERE IS NO EARLY MORNING REGISTRATION ON SATURDAY FOR THE UTS 100K AND THE UTS 50K RACES. THERE IS NO EARLY MORNING REGISTRATION ON SUNDAY FOR THE ERYRI 25K RACE.
PARTICIPANTS MUST REGISTER BEFORE FRIDAY 22: 00 IN ORDER TO RACE ON SATURDAY.
To help us issue your race bib smoothly we ask you to come prepared and to arrive early Due to the number of participants in each race there may be queues expected at busy times. We encourage you to arrive at registration early, with all your mandatory kit ready Do not leave your arrival at the Ultra-Trail Village to the last minute.
Your registration process will involve:
1. Mandatory kit check – you must be prepared to present all equipment and clothing as part of the mandatory kit If you do not have a mandatory item you will be asked to exit the queue If you have left any in your car or accommodation, you’ll need to rejoin the queue later to have your kit checked again
2. ID check – you will receive an ID e-mail with your race bib number in the week before the event Please have this e-mail available on your phone for scanning along with your photo ID.
3. Race pack collection – including your race bib, race wristband, drop bag (UTS 100M and UTS 100K) and ‘Support Crew’ wristband (UTS 100M and UTS 100K).
4. Welcome gift collection – event t-shirt (if applicable).
5. GPS tracker fitted – only applicable for UTS 100M, UTS 100K and UTS 50K* participants.
6. Profile photo taken – to be displayed alongside your timing profile.
*participants who purchased a GPS tracker as an added extra online
WAVE STARTS
The following races will be implementing a wave start structure in 2025
Wave starts help to improve the start line positioning and reduce crowding during the first sections of trail and into the first aid station. This allows you to better establish your pace amongst other participants and helps with our efforts to prevent any congestion points on the first long ascent of Yr Wyddfa (Snowdon).
Your wave start time will be automatically allocated to you in May and is based on your unique UTMB Index Participants with the highest UTMB Indexes will start in the earlier waves Participants without a UTMB Index will start in the later wave.
W ave start times for participants are fixed . We cannot accept requests to move participants between different start waves , so please do not send a message asking to move waves .
Cut-off times along the course are calculated considering the departure time of the participants in the final wave. Therefore, no participant is disadvantaged by being in a wave start. All participants will receive the maximum amount of time provided to complete the course as determined in the race regulations
RACE RULES AND INFO
Ultra - Trail Snowdonia by UTMB is an event which includes several races in the open country, winding through the technical trails of Eryri (Snowdonia) Each race takes place in one single stage, at an undefined pace and within a time limit
RACE BIBS
UTS 100 M : Around 165km in distance with 9,500 metres elevation gain, starting from Llanberis, in semi-autonomy
UTS 100 K : Around 103km in distance with 6,400 metres elevation gain, starting from Llanberis, in semi-autonomy
UTS 50 K : Around 55km in distance with 3,400 metres elevation gain, starting from Llanberis, in semi-autonomy
ERYRI 25K: Around 25km in distance with 1,300 metres elevation gain, starting from Llanberis, in semi-autonomy.
Race bibs are given to each participant once we have confirmed your race entry (ID check) and you have successfully presented all your mandatory kit to be checked. No mandatory kit = no race bib .
The race bib must be worn on the chest or stomach and must remain permanently and completely visible during the whole race The race bib must be always placed on top of all clothing and must not be placed on the leg or race pack . We recommend using a race belt for ease of race bib position.
The participant’s name and partner logos must not be altered or hidden. The race bib is your access to the race start, aid stations, medical points, showers, drop bag collection, and DNF repatriation service.
CUT-OFF TIMES
Cut-off times are calculated to allow participants to reach the finish in the maximum amount of time allowed and are indicated on the course profile and course information on the website.
The cut-off time indicated for an aid station is the latest time a participant must leave the venue. Anyone who has not left an aid station by this time will be withdrawn from the race immediately.
MEDICAL
Mountain Safety Team and Medical Team staff are positioned at specific locations along each course They are able to respond to serious medical concerns or emergencies should any of our participants get into severe difficulty and need assistance quickly.
Please remember: it is a participant’s responsibility to manage physical problems arising from muscle or articular pains, small wounds, etc
If a participant is in distress, or becomes seriously hurt, they should alert the organisers as follows:
1. Tell the Medical Team at the next aid station.
2. Tell the Mountain Safety Team on the course
3. Call the emergency phone (number on race bib) +44 (0)1615 530 664
If a participant is unable to move, and cannot call Event Control by using their mobile phone, they should:
1. Press the SOS button on their GPS tracker (UTS 100M and UTS 100K only)
2. Use their headtorch and whistle to attract attention from another participant. Each participant is expected to stop and give help to someone in distress and call the emergency phone
IT IS MANDATORY NOT TO LEAVE A PERSON IN DIFFICULTY ALONE
RACE RULES AND INFO
WAYMARKING
Ultra-Trail Snowdonia is a waymarked course. All race routes will be identified by a series of small, high-visibility, waymarkers along the course for you to follow. These are either flags placed into the ground, tape attached to tree branches or rocks, or directional arrows on gates, stiles or signposts
Waymarkers are positioned approximately every 50m However, on long stretches of continuous trail the spacing may be increased. Likewise, on shorter more technical stretches of trail, waymarking may be more frequent
• For obvious, well - defined, sections of trail markers will be placed approximately every 100m
• For non - obvious, difficult and technical sectionsof trail markers will be placed approximately every 25m.
• For junctions or sharp turns markers will be positioned in proximity of each other Typically three markers close together on approach and three after the turn This may be complemented with a directional arrow
Waymarkers are made from high contrast red and white fabric They include reflective material to ensure they are visible at night and reflect your headtorch light. To protect the environment we do not use paint on the trails
IMPORTANT : If you can no longer see any waymarkers ahead of you, or have not seen a waymarker for a considerable distance, we recommend you stop running and check your surroundings You may have missed a junction or turn. We recommend you download the race GPX file from the UTS website prior to the event and use this as an additional navigation tool to support the course marking Final race GPX files will be made available the week before the event
WITHDRAWING FROM THE RACE
During the race you may become injured or unable to continue. If you need to withdraw from the race, you must make your way to the nearest aid station This may be the aid station you had previously visited on the course.
Participants can only withdraw from the race at an aid station This is for safety reasons so we know who has withdrawn and subsequently who is still competing. You cannot voluntarily withdraw from the race at any other location unless you are severely injured and our Medical Team take the decision to remove you from the course
Upon withdrawing from the race you will have the barcode taken from your race bib and your GPS tracker removed (UTS 100M and UTS 100K only). You will continue to be allowed access to the aid station facilities You must keep your race bib displayed on you as this provides access to the aid station, medical services and transport to the race finish
We can transport withdrawn participants to the race finish in Llanberis by our Transport Team volunteers Depending on the demand for transport, it could take several hours before you are driven back to Llanberis If you have withdrawn at an aid station where spectating or personal assistance is permitted, it may be quicker for your support crew, a family member or friend to collect you
For safety, participants who withdraw from the race must not continue along the course under any circumstance
RACE RULES AND INFO
MANDATORY KIT
To ensure the safety and the smooth running of the event, each participant must carry with them all the items listed in the mandatory kit checklist and take all the equipment with them during the race, even if the runner is not using it
All participants will be subject to a mandatory kit check at registration . Organised random checks may be carried out during each race A penalty, including disqualification, will be applied to runners who do not have any of the mandatory kit items with them when inspected.
All clothing must be the correct size for the participant and without having been modified in any way after leaving the factory You carry this equipment in a pack which must be tagged during registration when race bibs are distribution This tag is not interchangeable during the race
Due to the lengthy duration of the event, participants may need to consider and plan how to ensure their electronic devices (including your mobile phone) have adequate battery life to function throughout the whole race This may involve choosing equipment which can be charged on-the-go or carrying additional batteries or battery packs.
UTS 100M and UTS 100K runners: please consider using the drop bag facility to recharge electronic devices
MUSIC : Listening to music using earphones is tolerated, so long as it is safe to do so External loud speakers are not permitted All earphones MUST be removed when approaching or crossing any roads, at all aid stations, and when approaching and passing Mountain Safety Team and Medical Team members
POLES: If you choose to take poles, they must be carried for the duration of the race If you do decide to use poles, it is forbidden to start without poles and then receive them during the race. No poles are allowed to be stored in the drop bags. The use of poles will be forbidden in certain zones along the route marked by specific signs for noise, safety or environmental reasons Poles must not be used in residential areas
LIVE TRAIL
LIVETRAIL APP
The LiveTrail app is used to monitor the progress of the races and provides you with valuable race information The app can also be used on your phone to alert the organisers if you need emergency medical assistance
In the event of an emergency, the LiveTrail app allows you to send directly to the organisers a SOS message via SMS text. This gives your precise GPS position
If you get into difficulty and need emergency medical assistance, you must still call the emergency phone
It is mandatory to have a working and charged mobile telephone that works in the UK
Under no circumstances should you put your mobile phone in airplane mode We need to be able to contact you before, during and after your race
For participants who will spend more than 15 hours on the course (i.e. UTS 100M and UTS 100K participants), you are advised to bring an additional batteries or external battery pack to keep your phone charged
Check the emergency contact number you provided with your registration is the number of the person you want to be alerted if you are involved in a medical incident
Scan the QR code to download the LiveTrail app prior to the race
IMPORTANT : Please check you have added your mobile phone number to your MyUTMB account
Trees and plants in Britain are becoming increasingly vulnerable to a range of new pests and diseases because of a combination of climate change and the increased movement of goods and people around the world. The threat to forests and woodlands in Eryri (Snowdonia) has never been greater and we need your help to prevent this
To stop the spreading of tree diseases we need all participants to take preventative measures before you travel to the event. You must arrive in Llanberis with clean footwear, clothing and poles. Thoroughly remove mud and dirt accumulated from previous running and training sessions from the soles of your shoes and tips of your poles
STORM DAMAGE AND FALLEN TREES
As a result of Storm Darragh, a red weather warning issued across the UK in December 2024, there was severe disruption and damage experienced in Wales Extreme winds and heavy rain in Eryri led to many fallen trees and flood damage to trails. Despite the continued efforts of Eryri National Park, private landowners and the various environmental agencies, there are still many damaged and fallen trees which you will encounter during the race
In most instances, is it possible to safely navigate around the fallen trees and follow the temporary diversion or new paths which have been formed. Please do not attempt to climb over any unstable trees or obstructions.
RESPECT FOR THE NATURAL PROTECTED AREAS
LIVESTOCK AND ANIMALS
You are recommended to stay as far away from livestock as possible while passing through farmland. Do not interfere with, or attempt to touch, sheep, lambs or cattle. This is for the welfare of the animals and your own safety. Do not approach any livestock in distress.
GATES AND FENCES
You must close all gates, even if another participant is approaching behind you. It is vital gates are closed to protect livestock from mixing. This is a serious and important aspect of farming life in Eryri. If in doubt, please close the gate. You will be penalised if caught leaving a gate open.
STAY TO WAYMARKED PATHS
We are privileged to run through stunning yet sensitive National Nature Reserves. These will be signposted at the entry and exit. You must follow the waymarking accurately to prevent damage to the flora and fauna. You must remain on the chosen path. Do not take short cuts.
RESPECT FOR OTHER VISITORS
SHARING THE
TRAILS
The trails, tracks and paths of Eryri welcome many visitors during the month of May when Ultra-Trail Snowdonia takes place As a result, we all need to show mutual respect and awareness of our surroundings when racing
We expect all UTS participants to be courteous and give way to other users You do not have priority on the trails. Participants are expected to give way to other walkers and hikers, especially those with children. You may be required to slow down, or stop, to let other people through a gate or climb over a stile Pay attention to your surroundings and be prepared to communicate or warn people if you intend to pass someone close by
Please follow the instructions of our volunteers and any emergency services you may encounter on the mountains, including the local Mountain Rescue Teams who may be helping a member of the public We are counting on you to be polite, considerate and foster a safe and enjoyable experience on the trails for everyone
RESIDENTIAL AREA QUIET ZONES
Participants in the UTS 100M and UTS 100K will travel through several villages during the hours of darkness, passing farms, cottages and residential properties on the way. We have an obligation to pass these houses quietly during the night and keep noise to a minimum. Please avoid disturbing residents and animals.
When travelling through urban and residential area you must not use your walking poles on the ground. Please do not shine your headtorches accidentally into doors or windows as you pass by houses as this can disturb homeowners
REDUCED PLASTIC AT AID STATIONS
To reduce unnecessary waste there will be no single use plastic (such as cutlery, cups or bowls) available at aid stations You need to bring your own utensils if you wish to eat hot meals or drinks at the aid stations
Littering is strictly forbidden. Participants must keep rubbish and wrappers (including gels, plastics, paper and organic waste) until they can deposit them responsibly in the bin at an aid station Participants can request a small, reusable waste bag at registration to store all your waste items while on the trails
Please separate your rubbish at the aid stations so we can ensure the correct items are recycled. Organic waste such as leftover bars, fruit skins etc should be disposed in the appropriate bins
THE RACE
Starting on the Friday afternoon, UTS 100M is the ultimate grand tour of Eryri (Snowdonia). It really is ‘Beautiful beyond belief. Savage beyond reason.’
The race climbs many of the highest peaks in Wales, boasts stunning mountain views and provides technical, challenging trails in equal abundance
* The timings provided above for the fastest arrivals at aid stations are calculated using a World Series algorithm.
These are optimistic for the challenge and terrain of Eryri. Therefore, based on previous editions of the event, we anticipate the fastest finisher will arrive in Llanberis at 13:00 on Saturday 17 May
MANDATORY KIT (UTS 100M)
CLOTHING
• Suitable robust trail-running footwear. Roadrunning or minimal barefoot style shoes are not acceptable
• Waterproof jacket with fitted integrated hood and sealed / taped seams. The jacket must be made of a waterproof (minimum recommended 10 , 000 Schmerber) and breathable (RET recommended inferior to 13 ) membrane The jacket must not have sections of fabric which are not waterproof, but air vents fitted by the manufacturer are accepted
• Warm second layer with long sleeves (cotton excluded) of a weight of minimum 180 g (men’s size medium) OR a combination of a long - sleeved warm layer weighing at least 100 g (men’s size medium) and a windproof jacket The windproof jacket does not replace the mandatory waterproof jacket, and vice versa
• Long-legged trousers or race leggings or the combination of leggings and socks that cover the legs completely . These can be carried in the running pack .
• Waterproof over -trousers with sealed / taped seams. These do not replace the long - legged trousers or race leggings .
• Warm and waterproof gloves. A combination of separate warm gloves (or mittens) and waterproof outer gloves is acceptable
• Warm beanie hat
• Cap, bandana or Buff®
Eryri National Park is a stunning location for trail-running. However, the weather in upland areas and mountain peaks can change within hours. Even in the month of May the region can experience significant fluctuations of both hot and cold temperatures with heavy rain, hail and even snow forecast!
This creates challenging, and potentially dangerous, conditions if you are not fully prepared. The weather can change without warning If you are involved in an incident, suffer an injury, or need to remain on the mountain for several hours, your clothing and equipment must allow you to remain safe until further assistance arrives.
It is essential you carry the mandatory kit required for your competition at all times. Your clothing and equipment must be suitable for all types of conditions and for the duration of your race (i.e. up to two nights outdoors on the mountains for the UTS 100M). We recommend you test using your kit in different weather conditions before arriving at the event to ensure it is suitable for you.
Your mandatory kit (including the hot or cold weather kit if required) will be checked before you are issued with your race bib. If you do not have an item of mandatory kit, you will not receive your race bib.
MANDATORY KIT (UTS 100M)
EQUIPMENT
• Running pack to carry mandatory kit throughout the race
• Smartphone with LiveTrail application installed and activated. The runner must be reachable at any time before, during and after the race Keep the phone on, airplane mode is forbidden and could give rise to penalties.
• Reusable cup (150ml minimum). This must be suitable for consuming hot drinks or soup Bottles or flasks with lids are not acceptable
• Reusable plate or bowl and cutlery. Eating utensils will not be provided at the aid stations. Please note:this itemwaspreviouslylistedasmandatorybuthassince beenmadeoptional(updatedinApril2025).
• Capacity to carry a minimum of 1.5 litres of fluid. At the departure of some aid stations it will be mandatory to leave with 1.5 litres of fluids depending on the sections to be covered or weather conditions
• 2 x fully functioning head or hand torches and spare batteries. Each torch must have a spare set of batteries. Powerbanks are permitted as a spare battery. However each torch must have their own powerbank/set of batteries. Both torches are recommended to have a minimum 200 lumens brightness
• Survival / emergency bivvy bag. These must have a minimum dimension of 2.0m x 0.9m. A survival blanket or foil blanket is not acceptable.
• Emergency food reserve. Recommendation of minimum 800kcals.
• Self-adhesive elasticated bandage. Minimum dimensions 100cm x 6cm
• Whistle
• Baseplate compass. Digital compasses on smartphones or smartwatches will not be accepted.
• Personal ID
RECOMMENDED
• Spare warm clothing
Useful in case of cold or wet weather or in the case of injury
• Synthetic insulation mid - layer or gilet . To keep warm while resting at aid stations
• Waterproof bag
• Personal first aid kit. Including a minimum of blister plasters, cleansing wipes, dressings, paracetamol and personal medications
• Poles
• Additional spare warm hat and gloves
• Anti - chafing cream or Vaseline
• GPS Watch
• Safety scissors
• Small sewing kit
• £40 cash
• Full change of clothes
MANDATORY KIT (UTS 100M)
HOT WEATHER KIT (Additional Items)
• Sunglasses. It is possible to use the same glasses for both the hot weather kit and cold weather kit if they are glasses with photochromic lenses
• Saharan cap. Or any headwear combination which completely covers the head and nape of neck.
• Sunscreen. Recommended minimum SPF 50
• Capacity to carry a minimum of 2.0 litres of fluid. This is an additional 0.5 litres capacity added to the mandatory 1.5 litres.
COLD WEATHER KIT (Additional Items)
• Protective eyewear. It is possible to use the same glasses for both the hot weather kit and cold weather kit if they are glasses with photochromic lenses
• Third warm layer. An intermediary layer between the second layer and waterproof jacket. It is recommended that this is a high-loft jacket or smock featuring synthetic insulation (e.g Primaloft or Polartec garments)
• Sturdy and closed-toe trail-running shoes. Minimalist and ultra-lightweight shoes are no longer allowed.
The hot weather and cold weather mandatory kits are an essential part of your preparation.
The weather in Eryri () can change very quickly It can be difficult to forecast the weather conditions accurately in the weeks before the event Each participant must be prepared to have with them these additional items for their race.
You will need to have these items for the mandatory kit check (if either the hot weather or cold weather mandatory kit is implemented). Therefore, it is important you bring these items with you to the event. If you do not have these items when asked you will not receive your race bib.
THE RACE
Starting early on the Saturday morning, UTS 100K covers the best of the mountainous areas of Northern Eryri (Snowdonia).
The route takes in some of the highest mountains in Wales, countless trails, technical ridges and epic views over the full 100km.
MANDATORY KIT (UTS 100K)
CLOTHING
• Suitable robust trail-running footwear. Roadrunning or minimal barefoot style shoes are not acceptable
• Waterproof jacket with fitted integrated hood and sealed/taped seams. The jacket must be made of a waterproof (minimum recommended 10 , 000 Schmerber ) and breathable (RET recommended inferior to 13 ) membrane The jacket must not have sections of fabric which are not waterproof, but air vents fitted by the manufacturer are accepted
• Warm second layer with long sleeves (cotton excluded) of a weight of minimum 180 g (men’s size medium) OR a combination of a long - sleeved warm layer weighing at least 100 g (men’s size medium) and a windproof jacket The windproof jacket does not replace the mandatory waterproof jacket, and vice versa
• Long-legged trousers or race leggings or the combination of leggings and socks that cover the legs completely . These can be carried in the running pack .
• Waterproof over -trousers with sealed/taped seams. These do not replace the long - legged trousers or race leggings .
• Warm and waterproof gloves. A combination of separate warm gloves (or mittens) and waterproof outer gloves is acceptable
• Warm beanie hat
• Cap, bandana or Buff
Eryri National Park is a stunning location for trail-running However, the weather in upland areas and mountain peaks can change within hours. Even in the month of May the region can experience significant fluctuations of both hot and cold temperatures with heavy rain, hail and even snow forecast!
This creates challenging, and potentially dangerous, conditions if you are not fully prepared The weather can change without warning. If you are involved in an incident, suffer an injury, or need to remain on the mountain for several hours, your clothing and equipment must allow you to remain safe until further assistance arrives
It is essential you carry the mandatory kit required for your competition at all times. Your clothing and equipment must be suitable for all types of conditions and for the duration of your race (i.e. up to two nights outdoors on the mountains for the UTS 100M) We recommend you test using your kit in different weather conditions before arriving at the event to ensure it is suitable for you.
Your mandatory kit (including the hot or cold weather kit if required) will be checked before you are issued with your race bib. If you do not have an item of mandatory kit, you will not receive your race bib
MANDATORY KIT (UTS 100K)
EQUIPMENT
• Running pack to carry mandatory kit throughout the race
• Smartphone with Live Trail application installed and activated. The runner must be reachable at any time before, during and after the race Keep the phone on, airplane mode is forbidden and could give rise to penalties.
• Reusable cup (150ml minimum). This must be suitable for consuming hot drinks or soup Bottles or flasks with lids are not acceptable
• Reusable plate or bowl and cutlery. Eating utensils will not be provided at the aid stations. Please note:this itemwaspreviouslylistedasmandatorybuthassince beenmadeoptional(updatedinApril2025).
• Capacity to carry a minimum of 1.5 litres of fluid. At the departure of some aid stations it will be mandatory to leave with 1.5 litres of fluids depending on the sections to be covered or weather conditions
• 2 x fully functioning head or hand torches and spare batteries. Each torch must have a spare set of batteries. Powerbanks are permitted as a spare battery. However each torch must have their own powerbank/set of batteries. Both torches are recommended to have a minimum 200 lumens brightness
• Survival / emergency bivvy bag. These must have a minimum dimension of 2.0m x 0.9m. A survival blanket or foil blanket is not acceptable.
• Emergency food reserve. Recommendation of minimum 800kcals.
• Self-adhesive elasticated bandage. Minimum dimensions 100cm x 6cm
• Whistle
• Baseplate compass. Digital compasses on smartphones or smartwatches will not be accepted.
• Personal ID
RECOMMENDED
• Spare warm clothing
Useful in case of cold or wet weather or in the case of injury
• Synthetic insulation mid - layer or gilet . To keep warm while resting at aid stations
• Waterproof bag
• Personal first aid kit. Including a minimum of blister plasters, cleansing wipes, dressings, paracetamol and personal medications
• Poles
• Additional spare warm hat and gloves
• Anti - chafing cream or Vaseline
• GPS Watch
• Safety scissors
• Small sewing kit
• £40 cash
• Full change of clothes
MANDATORY KIT (UTS 100K)
HOT WEATHER KIT (Additional Items)
• Sunglasses. It is possible to use the same glasses for both the hot weather kit and cold weather kit if they are glasses with photochromic lenses
• Saharan cap. Or any headwear combination which completely covers the head and nape of neck.
• Sunscreen. Recommended minimum SPF 50
• Capacity to carry a minimum of 2.0 litres of fluid. This is an additional 0.5 litres capacity added to the mandatory 1.5 litres.
COLD WEATHER KIT (Additional Items)
• Protective eyewear. It is possible to use the same glasses for both the hot weather kit and cold weather kit if they are glasses with photochromic lenses
• Third warm layer. An intermediary layer between the second layer and waterproof jacket. It is recommended that this is a high-loft jacket or smock featuring synthetic insulation (e.g Primaloft or Polartec garments)
• Sturdy and closed-toe trail-running shoes. Minimalist and ultra-lightweight shoes are no longer allowed.
The hot weather and cold weather mandatory kits are an essential part of your preparation.
The weather in Eryri (Snowdonia) can change very quickly. It can be difficult to forecast the weather conditions accurately in the weeks before the event. Each participant must be prepared to have with them these additional items for their race.
You will need to have these items for the mandatory kit check (if either the hot weather or cold weather mandatory kit is implemented) Therefore, it is important you bring these items with you to the event. If you do not have these items when asked you will not receive your race bib.
THE RACE
UTS 50K acts as the perfect stepping stone into Alpine-scale mountain ultratrail running.
The route ascends the highest peak in Wales and takes in several technical mountain trails around the Snowdon Massif.
MAP
MANDATORY KIT (UTS 50K)
CLOTHING
• Suitable robust trail-running footwear. Roadrunning or minimal barefoot style shoes are not acceptable
• Waterproof jacket with fitted integrated hood and sealed/taped seams. The jacket must be made of a waterproof (minimum recommended 10 , 000 Schmerber ) and breathable (RET recommended inferior to 13 ) membrane The jacket must not have sections of fabric which are not waterproof, but air vents fitted by the manufacturer are accepted
• Long-legged trousers or race leggings or the combination of leggings and socks that cover the legs completely These can be carried in the running pack
• Waterproof over -trousers with sealed/taped seams. These do not replace the long - legged trousers or race leggings
• Warm and waterproof gloves. A combination of separate warm gloves (or mittens) and waterproof outer gloves is acceptable
• Warm beanie hat
Eryri National Park is a stunning location for trail-running However, the weather in upland areas and mountain peaks can change within hours. Even in the month of May the region can experience significant fluctuations of both hot and cold temperatures with heavy rain, hail and even snow forecast!
This creates challenging, and potentially dangerous, conditions if you are not fully prepared The weather can change without warning. If you are involved in an incident, suffer an injury, or need to remain on the mountain for several hours, your clothing and equipment must allow you to remain safe until further assistance arrives
It is essential you carry the mandatory kit required for your competition at all times. Your clothing and equipment must be suitable for all types of conditions and for the duration of your race (i.e. up to two nights outdoors on the mountains for the UTS 100M) We recommend you test using your kit in different weather conditions before arriving at the event to ensure it is suitable for you.
Your mandatory kit (including the hot or cold weather kit if required) will be checked before you are issued with your race bib. If you do not have an item of mandatory kit, you will not receive your race bib
MANDATORY KIT (UTS 50K)
EQUIPMENT
• Running pack to carry mandatory kit throughout the race
• Smartphone with Live Trail application installed and activated The runner must be reachable at any time before, during and after the race. Keep the phone on, airplane mode is forbidden and could give rise to penalties
• Reusable cup (150ml minimum). This must be suitable for consuming hot drinks or soup. Bottles or flasks with lids are not acceptable
• Capacity to carry a minimum of 1.0 litres of fluid. At the departure of some aid stations it will be mandatory to leave with 1 0 litres of fluids depending on the sections to be covered or weather conditions
• 1 x fully functioning head or hand torches and spare batteries The torch must have a spare set of batteries. Powerbanks are permitted as a spare battery. The torch must have a minimum 200 lumens brightness
• Survival / emergency bivvy bag. These must have a minimum dimension of 2.0m x 0.9m. A survival blanket or foil blanket is not acceptable
• Emergency food reserve. Recommendation of minimum 800kcals.
• Self-adhesive elasticated bandage. Minimum dimensions 100cm x 6cm
• Whistle
• Baseplate compass. Digital compasses on smartphones or smartwatches will not be accepted.
• Personal ID
RECOMMENDED
• Warm second layer with long sleeves (cotton excluded) of a weight of minimum 180g (men’s size medium) OR a combination of a longsleeved warm layer weighing at least 100g (men’s size medium) and a windproof jacket. The windproof jacket does not replace the mandatory waterproof jacket, and vice versa
• Cap, bandana or Buff ®
• Spare warm clothing. Useful in case of cold or wet weather or in the case of injury
• Synthetic insulation mid-layer or gilet. To keep warm while resting at aid stations
• Waterproof bag
• Personal first aid kit. Including a minimum of blister plasters, cleansing wipes, dressings, paracetamol and personal medications
• Poles
• Additional spare warm hat and gloves
• Additional lightweight waterproof gloves
MANDATORY KIT (UTS 50K)
HOT WEATHER KIT (Additional Items)
• Sunglasses. It is possible to use the same glasses for both the hot weather kit and cold weather kit if they are glasses with photochromic lenses
• Saharan cap. Or any headwear combination which completely covers the head and nape of neck
• Sunscreen. Recommended minimum SPF 50
• Capacity to carry a minimum of 2.0 litres of fluid This is an additional 1 0 litres capacity added to the mandatory 1.0 litres.
COLD WEATHER KIT (Additional Items)
• Warm second layer with long sleeves (cotton excluded) of a weight of minimum 180 g (men’s size medium) OR a combination of a long - sleeved warm layer weighing at least 100 g (men’s size medium) and a windproof jacket The windproof jacket does not replace the mandatory waterproof jacket, and vice versa
• Third warm layer. An intermediary layer between the second layer and waterproof jacket It is recommended that this is a high-loft jacket or smock featuring synthetic insulation (e g Primaloft or Polartec garments)
RECOMMENDED (CONTINUED…)
• Anti-chafing cream or Vaseline
• GPS Watch
• Safety scissors
• Small sewing kit
• £40 cash
TIME 08:30 / 08:45 / 09:00
THE RACE
The ERYRI 25K is inspired by Eryri (pronounced Eh-ruh-ree), meaning the “highlands” itself. ERYRI 25K is our highlight on Sunday morning!
Eryri was once a land of the Golden Eagles which soared freely, high above the peaks of this mythical land which our 25K participants will experience before UltraTrail Snowdonia comes to a close on Sunday afternoon.
MANDATORY KIT (ERYRI 25K)
• Suitable robust trail-running footwear. Roadrunning or minimal barefoot style shoes are not acceptable
• Waterproof jacket with fitted integrated hood and sealed/taped seams. The jacket must be made of a waterproof (minimum recommended 10 , 000 Schmerber ) and breathable (RET recommended inferior to 13 ) membrane The jacket must not have sections of fabric which are not waterproof, but air vents fitted by the manufacturer are accepted
• Smartphone with Live Trail application installed and activated. The runner must be reachable at any time before, during and after the race Keep the phone on, airplane mode is forbidden and could give rise to penalties.
• Capacity to carry a minimum of 0.5 litres of fluid At the departure of some aid stations it will be mandatory to leave with 0.5 litres of fluids depending on the sections to be covered or weather conditions
• Survival / emergency bivvy bag. These must have a minimum dimension of 2.0m x 0.9m. A survival blanket or foil blanket is not acceptable
• Emergency food reserve. Recommendation of minimum 800kcals.
• Whistle
• Personal ID
HOT WEATHER KIT (Additional Items)
• Sunglasses. It is possible to use the same glasses for both the hot weather kit and cold weather kit if they are glasses with photochromic lenses
• Saharan cap. Or any headwear combination which completely covers the head and nape of neck.
• Capacity to carry a minimum of 1.0 litres of fluid. This is an additional 0.5 litres capacity added to the mandatory 0.5 litres.
Eryri National Park is a stunning location for trail-running However, the weather in upland areas and mountain peaks can change within hours. Even in the month of May the region can experience significant fluctuations of both hot and cold temperatures with heavy rain, hail and even snow forecast!
This creates challenging, and potentially dangerous, conditions if you are not fully prepared The weather can change without warning. If you are involved in an incident, suffer an injury, or need to remain on the mountain for several hours, your clothing and equipment must allow you to remain safe until further assistance arrives
It is essential you carry the mandatory kit required for your competition at all times. Your clothing and equipment must be suitable for all types of conditions and for the duration of your race (i.e. up to two nights outdoors on the mountains for the UTS 100M) We recommend you test using your kit in different weather conditions before arriving at the event to ensure it is suitable for you.
Your mandatory kit (including the hot or cold weather kit if required) will be checked before you are issued with your race bib. If you do not have an item of mandatory kit, you will not receive your race bib
MANDATORY KIT (ERYRI 25K)
COLD WEATHER KIT (Additional Items)
• Warm second layer with long sleeves (cotton excluded) of a weight of minimum 180g (men’s size medium) OR a combination of a long - sleeved warm layer weighing at least 100g (men’s size medium) and a windproof jacket. The windproof jacket does not replace the mandatory waterproof jacket, and vice versa
• Long-legged trousers or race leggings or the combination of leggings and socks that cover the legs completely. These can be carried in the running pack.
• Warm and waterproof gloves. A combination of separate warm gloves (or mittens) and waterproof outer gloves is acceptable
• Warm beanie hat
RECOMMENDED
• Warm second layer with long sleeves (cotton excluded) of a weight of minimum 180g (men’s size medium) OR a combination of a long - sleeved warm layer weighing at least 100g (men’s size medium) and a windproof jacket. The windproof jacket does not replace the mandatory waterproof jacket, and vice versa
• Cap, bandana or Buff
• Warm and waterproof gloves
• Warm beanie hat
• Cap, bandana or Buff ®
• Reuseable cup (150ml minimum)
• Capacity to carry a minimum of 1.0 litres of fluid. This is an additional 0.5 litres capacity added to the mandatory 0.5 litres.
• Personal first aid kit. Including a minimum of blister plasters, cleansing wipes, dressings, paracetamol and personal medications
• Anti-chafing cream or Vaseline
• GPS Watch
• £20 cash
ADVERSE WEATHER
The weather in Eryri (Snowdonia) can change quickly and sometimes with dramatic effect and consequences to people who are exposed on the trails These changes can mean the difference between summitting the highest peaks on the course safely or having to avoid areas with unavoidable dangers to ensure the wellbeing of our participants, volunteers and staff.
The Ultra-Trail Snowdonia Race Committee, consisting of the Event Director, Route Director and Medical Director , monitor the local weather forecast closely in the weeks and days before the event.
Using the latest and most accurate weather reports, we may need to implement essential changes to the race routes if there are new risks posed to our participants, volunteers and staff.
Each UTS race has an alternative, lower level, route designed as contingency should the weather forecast and expected conditions make the original routes unsafe to use.
Known as Bad Weather Routes (BWR), these will be used if there is any concern or warning the weather during the event will create dangerous conditions on the trails Such examples of adverse weather could be high winds, lack of visibility due to snow or torrential rain, thunderstorms and lightning
Bad Weather Routes have been designed to meet the same UTMB World Series race standards.
They will:
• Remain within the same Race Category as the original routes i.e. 100M, 100K, 50K, 20K.
• Award the same number of Running Stones to finishers as the original routes i.e. 4, 3, 2 , 1 respectively
Should adverse weather cause the Bad Weather Routes to be implemented, participants will be informed via e-mail and at registration. We thank you in advance for your cooperation should this need to happen
ADVERSE WEATHER
Given the duration of the UTS 100M and UTS 100K races, in the scenario of bad weather being forecast, it may be necessary all Bad Weather Routes will be implemented
The route used for a race must be the same for all participants to ensure fairness. For example; if adverse weather is only forecast for Sunday morning, the Bad Weather Route will need to be used from the beginning of the race on Friday or Saturday.
There will be no mid - race amendments to the routes once the race has started.
Due to sudden changes in weather conditions, some participants may not experience any adverse weather depending on where they are on the course at a particular time. Contrary, some participants may experience persistent poor weather for the full duration they are on the course.
Safety of participants is our priority Only in the most extreme scenario would the event be cancelled .
If the Bad Weather Routes are implemented, the decision will be communicated to participants at least 24 hours before the race start
If additional hot weather or cold weather mandatory kit items are required to be carried by the participant, this decision will also be communicated at least 24 hours before the race start
Each Bad Weather Route will be available to download from the UTS website as a GPX file (if implemented)
Participants will receive a notification from the LiveTrail app informing them of the final route decision (original or bad weather route) and if hot weather or cold weather mandatory kit items are needed in addition to the existing normal mandatory kit.
Therefore, it is essential you download the LiveTrail app to your mobile phone and your mobile phone number is correct on your MyUTMB profile You must allow notifications to be received
We thank you in advance for your patience and cooperation should this need to happen.
VOLUNTEER AT UTS 2026!
Hosting an event the size of Ultra-Trail Snowdonia wouldn’t be possible without the enthusiasm, energy and teamwork of our incredible Event Team volunteers.
You will be supported by over 300 volunteers who are making UTS a reality this May!
Whether they are greeting you at registration, marking the course on the mountains, distributing food and equipment, helping at an aid station, awarding medals at the finish line, or transporting participants back to Llanberis, each one of our volunteers play an essential part in making UTS a success Our volunteers leave a lasting impression Runners tell us how valuable the volunteers were to their own event experience!
Volunteering is the perfect way to support the event and see what goes on behind the scenes. You get a unique and up-close experience of the races and are in the middle of all the action
We’re always looking for more passionate volunteers to join our talented team. Whether you’re a UTS veteran or a first timer, a local resident in Eryri, or someone who enjoys giving back to the trail running community, you’d be welcome to join us for next year’s event. No previous experience is necessary – just a positive attitude and willingness to help others whatever the weather!
Whether you can join us for one day, two days, all three days or more, your contribution will be appreciated!
Check the UTS website later this summer for details of how you can join us in 2026 !
