4.9
(81)
1,272
hikers
118
hikes
Hiking around San Geronimo, located in Marin County, California, offers diverse natural landscapes for outdoor activities. The region features rolling hills, lush forests including redwood groves, and meandering creeks such as San Geronimo and Larsen Creeks. Prominent natural features include San Geronimo Ridge, Mt. Barnabe, Dickson Ridge, and Whites Hill, providing varied terrain for hikers. The area also encompasses public open spaces like San Geronimo Commons, showcasing a patchwork of ecosystems.
Last updated: May 12, 2026
9
hikers
16.7km
04:53
410m
410m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
7
hikers
11.6km
03:40
470m
480m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Sign up for free
5
hikers
11.2km
03:36
480m
480m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
3
hikers
23.1km
07:04
770m
830m
Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.
2
hikers
28.0km
08:25
900m
900m
Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.
Get access to more routes and recommendations from other explorers.
Sign up for free
Already have an account?
Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
Start today with a free account
Your next adventure awaits.
Login or Signup
Loma Alta literally translates to "high hill" and is the highest point in the Loma Alta Open Space Preserve. A few different dirt roads and trails lead to the bald summit that looks over the surrounding hillsides.
0
0
This large group picnic area is a lovely spot under a shady grove of towering redwoods that sits along Lagunitas Creek. There is piped drinking water and restrooms nearby, and if it is not in use, it is an excellent place to stop for lunch. If you are bike touring with friends and wish to spend time here, you can reserve this spot through the Samuel Taylor State Parks' department website.
0
0
Large campground with restrooms and showers in the towering forest along the San Geronimo Creek and the Cross Marin Trail. The Pioneer Trail loops to the south with a branch trail climbing up to the bolinas Ridge, whie the Papermill Trail remains flat along the creek with historic info panels about Samuel Taylor's 19th century paper mill
0
0
Popular rock beach spot to cool off in the creek right next to the long wooden pedestrian trail bridge
0
0
Sweeping views along the ridge trail, down into the valley filled by Kent Lake and beyond.
0
0
Along San Geronimo Ridge several stands of Pygmy (dwarf) sargent cypress forest display the uniquely stunted growth on poor soils. More info at https://www.onetam.org/peak-health/sargent-cypress
0
0
Start of the excellent Cross Marin Trail section (which is unfortunately just a segment here, far from crossing all of Marin County), using the old rail tracks that went to Sam Taylor Mills.
0
1
San Geronimo offers a wide variety of hiking experiences, with over 80 trails documented on komoot. These routes cater to different preferences, ranging from easy strolls through redwood groves to more challenging climbs with significant elevation gain.
Yes, San Geronimo has several excellent options for families. The Roy's Redwood Loop Trail in Roy's Redwoods Open Space Preserve is an easy, accessible path perfect for all skill levels. Additionally, the San Geronimo Commons, a rewilded former golf course, features a 1.2-mile loop trail that is particularly accessible and enjoyable for families.
Hikers in San Geronimo can immerse themselves in diverse natural landscapes. The region is characterized by rolling hills, lush forests including ancient redwood groves, and meandering waterways like San Geronimo and Larsen Creeks. You'll encounter diverse ecosystems, peaceful meadows, and unique redwood circles where new trees have grown around the remnants of original mother trees. Prominent natural features include San Geronimo Ridge, Mt. Barnabe, Dickson Ridge, and Whites Hill.
Yes, for those seeking a more strenuous adventure, the San Geronimo area provides challenging options. The Bay Area Ridge Trail to Bill's Trail via Barnabe loop in Samuel P. Taylor State Park is considered a difficult hike, offering significant elevation gain and distance. The San Geronimo Ridge Road also features trails with varying elevations and terrain, including a popular figure-eight hike covering 7 miles with substantial climbing.
San Geronimo offers enjoyable hiking year-round, but the best time often depends on your preference. Spring brings vibrant wildflowers and lush greenery after winter rains. Fall offers pleasant temperatures and beautiful foliage. Summer is generally warm and dry, with many ridge trails providing shade. Winter can be mild, but trails might be muddy after heavy rainfall. Always check local weather conditions before heading out.
Yes, San Geronimo features several excellent loop trails. A popular easy option is the Roy's Redwood Loop Trail. For a moderate challenge, consider the Old Railroad Grade, Glen Fire, Smith Ridge & Sunrise loop or the San Geronimo Ridge Rd. to East Sylvestris via Green Hill loop. The Peters Dam Road to Kent Lake loop is another great choice, leading through the Mount Tamalpais Watershed.
The hiking experience in San Geronimo is highly rated by the komoot community, with an average score of 4.8 stars from over 70 reviews. Hikers often praise the region's diverse landscapes, from peaceful redwood groves to scenic ridge views, and the opportunity to explore vital creek systems. The variety of trails, catering to different ability levels, is also frequently highlighted.
While hiking, you can discover several notable points of interest. Keep an eye out for the unique redwood circles, which are remnants of ancient forests. You might also encounter The Big Rock - Skywalker Ranch or explore the Roy's Redwoods Open Space Preserve itself, known for its accessible paths and ancient trees. The area is also rich in wildlife, especially around the creeks.
Public transportation options directly to all trailheads in San Geronimo can be limited due to its rural nature. It is advisable to check local Marin Transit schedules and routes for the most up-to-date information on bus services that might connect to the San Geronimo Valley. Many visitors typically access the trailheads by car.
Parking is generally available at designated trailheads and open space preserves throughout the San Geronimo Valley. For example, Roy's Redwoods Open Space Preserve and San Geronimo Commons typically have parking areas. It's always recommended to arrive early, especially on weekends, as parking can fill up. Always observe posted parking regulations.
Yes, if you're looking for a quieter experience, the open fire roads and rugged side trails around San Geronimo are an ideal choice. While popular routes like Roy's Redwoods can see more visitors, exploring the broader network of trails, particularly on weekdays or during off-peak hours, can provide ample space for a peaceful outdoor experience away from the crowds.
Many trails in Marin County, including those in the San Geronimo area, are dog-friendly, but regulations can vary by specific preserve or park. Dogs are generally permitted on leash on most fire roads and designated trails. It's always best to check the specific rules for the open space preserve or park you plan to visit before heading out with your canine companion.
The San Geronimo Valley maintains a charming rural character, but there are local amenities available. You can find cafes and small eateries in the nearby communities within the valley, such as San Geronimo or Forest Knolls, which are convenient for a post-hike refreshment. For more options, the towns of Fairfax or Point Reyes Station are a short drive away.


Browse the best Hikes in other regions.