About ACES

Aspen Center for Environmental Studies (ACES) is a nonprofit environmental science education organization with three locations in the Roaring Fork watershed: Hallam Lake, Rock Bottom Ranch, and the Catto Center at Toklat.

Making more than 125,000 annual education contacts, ACES reaches Colorado residents and visitors through guided hikes, environmental science lessons in schools and in the field, kids camps and adult classes, public lectures, community events, environmental education consulting, and more. Our programs focus on ecological literacy, regenerative agriculture, forest and ecosystem health, land restoration, and environmental civic leadership.

ACES also partners with land trusts, public agencies, government entities, and other non–profits to collaborate on regional land stewardship efforts. Projects include restoration and cooperative management on open space, public lands, and private lands under conservation easement.

Trustees

Daniel Shaw, Chair Sam Brown Neal Dempsey Andy Docken Ryan Elston, Vice Chair Mark Hamilton Reenie Kinney Leslie Lamont Kim Master Diane Moore Gina Murdock Jerry Murdock Robert Musser Walter Obermeyer, Treasurer Ben Pritzker Barbara Rosenberg Sheri Sanzone Ashley Schiff Ramos Rachel Sherman, Secretary Maile Spung, Officer Colter Van Domelen

Generations of ACES alumni gather together at the Catto Center at Toklat for a special celebration in honor of ACES’ 50th anniversary in September 2019.