Las Trampas Wilderness Regional Preserve
Las Trampas Wilderness Regional Preserve ahs more than 5,700 acres of wilderness and an expanded trail system that for hikers, bicycles and horseback riders. This park is home to the Las Trampas and Bollinger faults and their related geological formations including remnants of ancient shoreline, fossil-bearing rock layers, and a volcanic tuff. The Bollinger staging area has a chemical toilet and picnic site. There is no water within the park.
Bicycles may be ridden on designated bicycle trails, and on fire or service roads unless otherwise posted. No bicycles are allowed on Rocky Ridge View Trail.
8 AM to sunset
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Address18012 Bollinger Canyon Road
From I-580 in Castro Valley, take Crow Canyon Road north to Bollinger Canyon Road. Turn left (north) onto Bollinger Canyon Road and follow it into the park. From I-680 in San Ramon, take Crow Canyon Road west to Bollinger Canyon Road, turn right (north) and follow it into the park.