San Geronimo • best hiking

5 Best Hiking Trails & Places To Hike Near San Geronimo California

San Geronimo sits in a pocket of West Marin where redwood groves, open ridges, and hidden creeks are all a few minutes apart. Trails here feel low-key and local, but the scenery ranges from mossy canyons to big bay views on clear days. These five hikes capture the variety of the valley, whether you want a mellow evening loop or a half-day climb.

 
01

Roy's Redwoods Open Space Preserve

San Geronimo Valley • Shady Redwood Preserve • Best Close-To-Town Escape

A short drive from town, Roy's Redwoods winds through towering trees and soft, shaded singletrack that feels far wilder than its mileage.

Start from the small roadside pullouts and wander the loops that skirt open meadows before ducking into the redwoods. The grades are gentle enough for kids and casual hikers, but you can add side trails for a longer wander. Expect mud in winter and cool, mossy shade almost year-round.

02

Gary Giacomini Open Space Preserve

Ridge Above Woodacre And San Geronimo • Rugged Ridge Open Space • Best For All-Day Adventure

Steep fire roads and quieter side paths lead to long ridgeline views that stretch from the San Geronimo Valley toward Tomales Bay and Mount Tam.

From valley trailheads, you climb quickly onto the spine of the hills, where wind-scoured grasslands and pockets of forest trade off. The climbs are sustained and often exposed, so this is a better choice for cool mornings than hot afternoons. Bring plenty of water and be ready for a real workout with big-sky payoffs.

03

Samuel P. Taylor State Park

Lagunitas And Sir Francis Drake Corridor • Creekside State Park • Best For Mixed-Ability Groups

Paved and dirt trails follow Lagunitas Creek under tall redwoods, with side paths that climb to quieter ridges if you want more of a workout.

The Cross Marin Trail offers an easy, mostly flat option ideal for strollers, bikes, and slow Sunday walks under the trees. More adventurous hikers can peel off toward loops like the Pioneer Tree or longer climbs up Barnabe Peak for views over the valley. Picnic tables, restrooms, and reliable shade make it an easy full-day base for a group.

04

Loma Alta Open Space Preserve

Between Fairfax And Lucas Valley • Panoramic Ridge Hike • Best For Big Views

A stout climb on open fire roads leads to one of the broadest 360-degree viewpoints in the area, with sweeping vistas over West Marin and beyond.

From the trailhead, you grind steadily uphill through rolling grassland, passing seasonal ponds and grazing cattle before the ridge opens fully. The summit area is famously windy but rewards you with views that take in Mount Tam, the bay, and the patchwork of ranchlands to the west. Aim for a clear dawn or golden-hour start to see the hills light up.

05

French Ranch Open Space Preserve

Woodacre Foothills • Oak-Studded Valley Preserve • Best For Mellow Loops

Short, rolling trails trace shaded creeks and open pastures, offering an easygoing taste of the valley without a major climb.

The main paths here meander along the valley bottom, weaving between oaks, bays, and small seasonal streams with just enough up-and-down to feel like a walk, not a slog. It is popular with locals squeezing in a quick loop before or after work, and dogs on leash keep the mood neighborly. For a bit more effort, take one of the side trails that climb briefly into the surrounding hillsides.