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San Andreas Trail – San Andreas Lake loop from San Bruno

Routes

Bike touring routes & trails

San Andreas Trail – San Andreas Lake loop from San Bruno

Hard

4.6

(1512)

12,105

riders

San Andreas Trail – San Andreas Lake loop from San Bruno

03:00

46.1km

610m

Cycling

Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: March 20, 2026

Waypoints

Start point

Train Station

Get Directions

3.97 km

San Andreas Trailhead — Skyline Boulevard

Highlight • Trail

The San Andreas Trail, a popular multi-use path in San Mateo, starts/ends at this point by the intersection of Skyline Boulevard and San Bruno Avenue. Unfortunately, there are no amenities here, but there is a large gravel parking area across the street.

Tip by

3.98 km

San Andreas Trail

Highlight (Segment) • Trail

Paved bike trail along the San Andreas fault between the lake and Skyline Blvd to Crystal Springs.

Tip by

23.5 km

Ralston Bike Trail

Highlight (Segment) • Cycleway

The Ralston Bike Trail is a paved path connecting the Belmont community to the Crystal Springs Trail. Stretching one mile, it runs from the Ralston Avenue interchange at Highway 92, over I-280, and across Canada Road. Open to both bicycling and hiking, it is a great spot to see beautiful golden fields.

Tip by

31.1 km

Lower Crystal Springs Reservoir

Highlight • Lake

Lower Crystal Springs Reservoir is part of the Crystal Springs Reservoir system, and provides water to the San Francisco Bay Area. The area surrounding the reservoir is rich in biodiversity, home to rare and endangered species like the San Mateo thornmint and the Marin Dwarf Flax. While recreational activities on the water are restricted to protect the watershed, the adjacent Crystal Springs Regional Trail offers scenic views for hikers and cyclists.

Tip by

33.6 km

Jepson Laurel

Highlight • Natural Monument

Biggest Laurel tree in California

Tip by

36.4 km

San Andreas Lake

Highlight • Lake

San Andreas Lake is a hidden gem tucked into the hills of San Mateo County, just south of San Francisco. Originally a natural sag pond formed by the San Andreas Fault, it was transformed into a reservoir in the late 1800s and now serves as a vital water source for the region. The lake is off-limits for swimming or boating, but you can enjoy its peaceful beauty from the San Andreas Trail or the popular Sawyer Camp Trail, which runs along its eastern edge. It's a serene spot where you can walk or bike with sweeping views of the water and surrounding hills, all while standing right on one of the world’s most famous fault lines. Despite its proximity to urban life, San Andreas Lake offers a quiet, scenic escape steeped in natural and historical significance.

Tip by

46.1 km

End point

Train Station

Way Types & Surfaces

Way Types

35.1 km

5.64 km

3.17 km

1.88 km

204 m

140 m

Surfaces

45.4 km

675 m

< 100 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (210 m)

Lowest point (10 m)

Weather

Wednesday 6 May

19°C

12°C

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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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San Andreas Trail – San Andreas Lake loop from San Bruno

San Andreas Trailhead — Skyline Boulevard

San Andreas Trail

Ralston Bike Trail

Lower Crystal Springs Reservoir

Jepson Laurel

San Andreas Lake

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