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San Mateo County

San Andreas Lake

Discover
Places to see

Lakes

United States

California

San Mateo County

San Andreas Lake

San Andreas Lake

Recommended by 25 cyclists

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    4.7

    (3)

    36

    riders

    1. San Andreas Trail Loop

    27.5km

    01:41

    250m

    Intermediate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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    Intermediate

    Intermediate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

    Intermediate

    Intermediate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

    Intermediate

    Tips

    May 29, 2025

    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.

      August 16, 2016

      San Andreas Lake is a reservoir adjacent to the San Francisco Peninsula cities of Millbrae and San Bruno in San Mateo County, California.

      It is situated directly on the San Andreas Fault, a continental transform fault that extends roughly 800 miles (1,300 km) through California. It forms the tectonic boundary between the Pacific Plate and the North American Plate.

      en.wikipedia.org/wiki/San_Andreas_Fault

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        Elevation 100 m

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        Tuesday 30 September

        22°C

        15°C

        15 %

        If you start your activity now...

        Max wind speed: 9.0 km/h

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        Location: San Mateo County, California, United States

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