Las Trampas Regional Wilderness

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Panoramic view near the junction of Rocky Ridge and Sycamore trails

View looking south along Rocky Ridge trail

View from Rocky Ridge looking east at Las Trampas Ridge. The visitor parking lot is visible amid the trees at the bottom of the valley. Mount Diablo can be seen in the hazy distance

Las Trampas Regional Wilderness is a 5,342-acre regional park located in Alameda and Contra Costa counties in Northern California. It is part of the East Bay Regional Park District. It consists of two long, hilly ridges flanking a narrow valley which contains a horse stable and visitor parking. Some of the hiking trails include steep sections; they can involve as much as 900 feet of elevation change. The park has been described as "the tough guy of the East Bay Regional Park District."^[1]

Bicycles are allowed on half of the trails; equestrians and hikers on all of the trails. Dogs are allowed. Cows, calves, steers and an occasional free-ranging bull can be encountered on the trails. Deer can be seen from time to time.

On its eastern border, the park encloses the triangular property of the Eugene O'Neill National Historic Site on all three sides, with access from Las Trampas via hiking trails or from Danville by single-lane road.

The western portion of Las Trampas is a sensitive EBMUD watershed and is closed to hiking except by permit.