SPEND FIVE DAYS IN THE MT. DIABLO REGION (CONCORD, PLEASANT HILL, WALNUT CREEK & TRI-VALLEY) The Mt. Diablo Region is a blend of clean, open space and charming downtowns, nestled in the valleys of Mount Diablo, the highest peak in the Bay Area. Here you’ll enjoy plenty of outdoor activities, culinary thrills, upscale shopping, live music, local beer and California’s oldest award-winning wine country. Visit us for a romantic getaway, girls weekend, mountain adventure or family trip, as you soak in the California sunshine.