Las Trampas Ridge is a steep rocky ridge that runs northwest for about 8 miles from the town of San Ramon to the town of Lafayette in the SF East Bay with San Ramon Valley on the east side and Bollinger Canyon on the west.
Most of the rugged slopes are covered in dense sagebrush chaparral, oak and laurel trees with occasional rock slabs jutting up. A good system of trails run along the various portions of the ridge over high points roughly 16 to 1700 plus feet in elevation.
Las Trampas is Spanish for "the traps". Spanish hunters used the steep canyon walls with the network of subridges to trap deer.
Las Trampas Peak is the big rolling high point at the northwest end of the ridge. Several acres of open hillside can be roamed to expand the view which includes Mt. Diablo to the east, the Briones Hills to the north, San Pablo Ridge to the northeast and Rocky Ridge just across Bolinger Canyon to the southwest.
Las Trampas Peak is a moderate hike from Bollinger Canyon along the ridge and back down to the canyon. It is approximately 4.5 miles and 1500 ft. of gain taking in the ups and downs along the ridge.
The peak can also be approached from the town of Danville in San Ramon Valley. For a map of Las Trampas Regional Wilderness that includes these trail heads click here.
From Interstate 580 in Castro Valley take Crow Canyon Road north 7.5 miles to Bollinger Canyon road. Follow the directions above.
Return about .75 miles along the ridge and take the fire road trail back down to the right to Bollinger Canyon another 1.25 miles to the parking area again.
Red TapeClick here for Red Tape info.
When to Climb
Keep in mind extreme heat in the summer.
The Corral Area is a reservable overnight group camp. Campers need to provide their own water. The parks water supply is inconsistent and water may be unavailable at any time. For information or reservations phone 1-888-EBPARKS or 1-888-327-2757, press option 2.