Las Trampas Wilderness Regional Preserve
San Ramon, Contra Costa County, CA
- Size
- 4,102 acres Source
- Managed by
- East Bay Regional Park District
About Las Trampas Wilderness Regional Preserve
Over 6,000 acres of rugged wilderness near San Ramon for hiking and horseback riding. Source
Las Trampas Wilderness Regional Preserve offers 6,050 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.
Know before you go
Las Trampas Wilderness Regional Preserve covers 4,102 acres in San Ramon, Contra Costa County. 12 named trails add up to about 20.9 miles inside the park; the longest is Madrone Trail at 4.1 miles, and Madrone Trail has the most up and down (about 1,614 feet). Mapped trails range from 460 to 1,964 feet in elevation. OpenStreetMap shows 5 parking areas, including Elderberry/Little Hills Ranch Parking (40 spaces) and Ringtail Cat Staging Area, plus 2 restrooms and 2 drinking fountains.
Facilities
- Camping
- Drinking Water
- Picnic Area
- Restrooms
Facility details: OpenStreetMap
Las Trampas Wilderness Regional Preserve at a glance
- PParking · 5: Elderberry/Little Hills Ranch Parking (40 spaces), Ringtail Cat Staging Area
- WCRestrooms · 2
- WDrinking water · 2
- Named trails · 12
© OpenStreetMap · CPAD · About this map
Trails
| Trail | Mapped length | Elevation | Surface & uses |
|---|---|---|---|
| Madrone Trail | 4.1 mi | 1,614 ft up & down623–1,280 ft | UnpavedBikesHorses |
| Bollinger Creek Loop Trail | 2.6 mi | 1,096 ft up & down1,022–1,760 ft | UnpavedNo bikesHorses |
| Las Trampas Ridge & Calaveras Ridge Trail | 2.6 mi | 1,256 ft up & down1,280–1,799 ft | UnpavedBikesHorsesNo bikes |
| Elderberry Trail | 2.2 mi | 984 ft up & down985–1,717 ft | Unpaved |
| Las Trampas Ridge / Calaveras Ridge Trail | 1.5 mi | 560 ft up & down1,501–1,725 ft | BikesHorses |
| Cuesta Trail | 1.4 mi | 542 ft up & down1,547–1,899 ft | UnpavedHorses |
| Ridge View Trail | 1.3 mi | 467 ft up & down1,707–1,964 ft | UnpavedBikesHorses |
| Devil's Hole Trail | 1.3 mi | 897 ft up & down882–1,893 ft | Unpaved |
| Sycamore Trail | 1 mi | 905 ft up & down1,054–1,912 ft | Unpaved |
| Virgil Williams Trail | 1 mi | 599 ft up & down515–1,022 ft | UnpavedNo bikesHorses |
| Lower Vortex | 1 mi | 642 ft up & down460–1,130 ft | Unpaved |
| Corduroy Hills Trail | 0.9 mi | 606 ft up & down1,344–1,760 ft | UnpavedNo bikesNo horses |
Compared with nearby parks
Among the 24 other parks in this guide within 10 miles, Las Trampas Wilderness Regional Preserve is number 2 of 25 by size at 4,102 acres. 3 nearby parks have more mapped trail mileage than its 20.9 miles.
Closest places for what Las Trampas Wilderness Regional Preserve doesn't list:
- Playground: Dr. Aurelia Reinhardt Redwood Regional Park (6.3 mi)
- Swimming: Cull Canyon Regional Recreation Area (6.3 mi)
- Tennis Courts: Bay Trees Park (7.8 mi)
Rules & reservations
Official park pageGate hours change through the year; check the posted schedule.
Map & directions
18012 Bollinger Canyon Road, San Ramon, CA 94583
Nearby parks
Straight-line distanceContinue exploring
Contra Costa County parksSources & verification
Last verified: Oct 15, 2026- California Protected Areas Database (CPAD) 2026aname, county, agency, access, acres
- East Bay Regional Park District park pageofficial_url, hours, address, description
- OpenStreetMap facilities and trailsfacilities.camping, facilities.drinking-water, facilities.picnic-area, facilities.restrooms, trails
- Official park page (city in the park's mailing address; the park lies outside Census place boundaries)city
- OpenStreetMap: parking, restrooms, water, trailheads, trail lines, and bus stopsvisit
- Terrain Tiles elevation (USGS 3DEP), sampled every 20 m along OpenStreetMap trail linestrails.elevation
- Official park page (introduction excerpt)intro