San Ramon Surrounded by Las Trampas Wilderness Parks and Trails

images 4San Ramon enjoys the beauty and recreation provided by Las Trampas Regional Wilderness Parks. How lucky are we to call this incredible area our home!  San Ramon residents have daily views of gorgeous rolling hills, access to award winning public schools, friendly neighborhoods, and nearby convenient local shopping.  Read on to learn more about the Las Trampas Regional Wilderness Parks and Trails.

Article Reprinted from Los Trampas Regional Park Website.  For more information, please go to:

About The Parkimages 3

Las Trampas Regional Wilderness offers 5,342 acres of wilderness and an expanded trail system that allows hikers and horseback riders to enjoy its remote and rugged areas. The park’s size and terrain allow visitors a feeling of privacy and escape from urban hustle and bustle. Carry plenty of drinking water for yourself, your dog(s), and your horse(s) when visiting the park. The park’s water supply is inconsistent and water may be unavailable at any time.

Park Featuresdownload (2)


Two major Bay Area faults–the Las Trampas and Bollinger faults–account for the uplift and exposure of four well-defined geological formations. The Orinda formation holds remnants of ancient beach and shoreline; the El Sobrante formation consists of several fossil-bearing compressed rock layers; and the Pinole Tuff is of volcanic origin.

Little Hills Picnic Ranch

Adjacent to Las Trampas, this facility is available by reservation for group picnics of between 50 and 1,500 people. Facilities include a swimming pool, covered picnic areas, playfields and barbecue/picnic areas.
For information, call The Ranch at Little Hills at (925) 837-8158,

Las Trampas Stables

Las Trampas Stables offers horse boarding, riding lesson for children and adults 5 years and older, special equestrian events for groups, birthday parties and day camps by reservation only. Trail rides are currently not offered, but coming soon!  Please visit or for information and reservations email: http://lastrampasstables@gmail.comor call (925) 862-9044

The O’Neill National Historic Site

Owned and operated by the National Park Service, this site is open to the public by reservation. Call (925) 838-0249 for information.


The dominant woodland vegetation on the western and southern exposures of Las Trampas and Rocky ridges is black sage, chamise and buck brush. These are interspersed with toyon, hybrid manzanitas, elderberry, gooseberry, chaparral currant, sticky monkeyflower, coffeeberry, coyote bush, poison oak, hollyleaf red berry, deer weed and dozens of other species. There are some creek dogwood along Bollinger Creek.

The dominant trees are coast live oak and bay laurel. Other species are buckeye, big leaf maple, canyon live oak, black oak and scrub oak. The latter, with its mistletoe, seems to prefer the ridgetop habitat at the end of Chamise Trail. Half a dozen fern species are found in the park and there are large areas of grassland.

Animals and Birdsimages (2)

The park’s abundant wildlife includes raccoons, foxes, opossums, bobcats, skunks and squirrels. Late in the day, with binoculars, you can count the deer in the hill areas adjacent to the parking lot. Las Trampas is Spanish for “The Traps” or “The Snares.” According to Erwin G. Gudde’s California Place Names, traps were once set in the chaparral of the hills to catch elk. Historical records also indicate that antelope and mountain lions were plentiful during the last century. Sightings of the big cats have been reported in recent years. There are many species of hawks, and golden eagles are occasionally sighted.

The East Bay Regional Park District leases some of the grassland areas for cattle grazing. Cattle keep the grass height down, which lessens the fire hazard during the dry season.

Park Activities

Hiking and Horseback Riding

The park is bisected by Bollinger Creek. To the west is Rocky Ridge, accessible from the parking lot via a paved road that brings hikers near the 2,024-foot summit. At the 1,760-foot elevation you can hike westward along a trail managed by the East Bay Municipal Utility District to the Valle Vista Staging Area on Canyon Road in Moraga, or south to the Chabot staging area in Castro Valley. A permit is required for hiking on EBMUD lands. Call 510-287-0459 for more information.

Stone outcroppings on Rocky Ridge are beautifully sculptured by the wind and colored by many lichen species. An entire day may be spent hiking the ridge and the Devil’s Hole area. Wildflowers abound in season and are especially beautiful after a rain.

Las Trampas Ridge, reached via Chamise and Bollinger Creek Loop trails, is east of Bollinger Creek. The view from the ridge affords the sights of the Ygnacio, San Ramon and Amador valleys, Mt. Diablo, Carquinez Straits and other distant points of interest. The Corduroy Hills Trail, skirting Eagle Peak, is for hiking only, as are the Sycamore, Mahogany and Trapline trails. Boots are recommended. Park visitors should use only signed trails that appear on the map; trails that do not appear on the map are not maintained by Regional Park staff, and some may be in a sensitive resource area.


Near the parking lot are two picnic areas–Steelhead and Shady. Facilities are available on a first-come, first-served basis. The Little Hills Picnic Ranch is available for group picnics of between 50 and 1,000 people. For reservations, contact the The Ranch at Little Hills at (925) 837-8158, or visit their website at

Group Camping

The Corral Area is a reservable overnight group camp. Campers need to provide their own water. The park’s 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.


The park is a good place for birdwatching. There are many species of hawks, and golden eagles are occasionally sighted.


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.

ADA accessibility iconPark Accessibility

There are disabled parking, a wheelchair accessible chemical toilet, drinking fountain and picnic site at the Bollinger staging area.

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