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San Andreas Lake

San Bruno · Millbrae, California — San Mateo County.

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486Surface acres

Surface area: The USGS National Hydrography Dataset outline (NHD Permanent ID 56646943).

Location & fast facts

Where San Andreas Lake is in California

The red circle marks San Andreas Lake.

Fast facts

About San Andreas Lake

  • County: San Mateo
  • Cities & towns on the shore: San Bruno, Millbrae
  • Mapped as: Lake or pond (USGS National Hydrography Dataset)
  • Distance: about 12 mi from San Francisco and 85 mi from Sacramento, straight-line (not driving distance)

Towns and counties: U.S. Census Bureau boundaries overlaid on the USGS lake outline (California: incorporated places touching the lake, otherwise the nearest one).

Fishing in California

Official CDFW pages. Rules and fees change; check before you go.

Good for & watch for

Good for

  • Camping. 11 campgrounds within 15 mi (list)

Watch for

  • Non-native/invasive species. Eurasian watermilfoil recorded. Clean, drain and dry your boat and gear.

Built only from the data on this page: official access lists, OpenStreetMap beaches and trails, campground listings, state and USGS invasive-species records. We don't rate crowds or water quality.

Lake map

San Andreas Lake shoreline

1 mileN

No public access sites are listed for this water in the OpenStreetMap boat ramps (no statewide agency ramp layer used) data.

Shoreline: USGS National Hydrography Dataset (NHD Waterbody, Permanent ID 56646943), public domain. State outline: U.S. Census Bureau TIGERweb. Points: OpenStreetMap boat ramps (no statewide agency ramp layer used). Interactive map: Leaflet with © OpenStreetMap contributors. Not for navigation.

Campgrounds near San Andreas Lake

We found 11 campgrounds and RV parks within 15 miles of San Andreas Lake, 3 of them within 5 miles. Distances are straight-line from the nearest point on the shoreline, so driving distance is longer.

5 more within 15 miles

All campgrounds & RV parks in California

Green tent icons on the lake map mark campgrounds near the shore, and the interactive map shows the closest 12. Amenities are listed only where a source records them; call or check the campground's website before you go, since seasons and rates change every year.

Campground data: Recreation.gov (RIDB) · OpenStreetMap contributors (ODbL). Pulled Oct 12, 2026.

Nearest airports

The closest airport with scheduled passenger flights to San Andreas Lake, plus larger airports within about 150 miles:

Car rental links go to our partner Discover Cars; LakeRipple may earn a commission at no extra cost to you. Affiliate disclosure.

Airports with scheduled airline service from OurAirports (large and medium airports); larger airports are FAA large, medium and small hubs by FAA CY2025 enplanements ("major airport" = FAA large hub). Distances are straight-line from the lake's center, not driving distance; road routes are longer.

Conditions right now

Air temperature & conditions (nearest NWS station)Loading…
Fetching the latest National Weather Service observation…

Live from the National Weather Service API for the lake's coordinates (37.5972, -122.4263). The nearest station may be several miles away. NWS forecast for San Andreas Lake. No live water-temperature sensor is shown because we haven't found a public one for this lake.

Sun, moon & best fishing times

Sun & moon at San Andreas Lake

Best fishing times

Major periodMinor periodDaylight

    Based on solunar theory, an estimate. Major periods (about 2 hours) center on when the moon is directly overhead or underfoot; minor periods (about 1 hour) center on moonrise and moonset. The 0–100 activity score rises during those periods and gets a boost near sunrise and sunset and around the new and full moon. Weather, water temperature and pressure often matter more. Sun and moon times are calculated in your browser from the lake's coordinates with standard astronomy formulas, shown in PT (America/Los_Angeles), and accurate to within a few minutes.

    Non-native/invasive species

    Reported on or near San Andreas Lake

    Clean, Drain, Dry. Remove plants and mud, drain all water, and dry your boat, trailer and gear before moving to another water.

    USGS Nonindigenous Aquatic Species database

    USGS records matched to this water by location (within about 150 m of the outline) or by the place name in the record. A record shows a sighting was reported; it doesn't prove the species is still there. As of Oct 10, 2026.

    Contact & official info

    Questions about San Andreas Lake

    How big is San Andreas Lake?

    San Andreas Lake covers about 486 acres in San Bruno and Millbrae, California (San Mateo County).

    Are there campgrounds near San Andreas Lake?

    Yes. We list 11 campgrounds and RV parks within 15 miles, 3 of them within 5 miles.

    What towns are on San Andreas Lake?

    San Andreas Lake touches San Bruno and Millbrae in San Mateo County, California.

    Share a tip or fishing report

    Know San Andreas Lake? Tell us about the launch, parking, where they're biting or anything a first-time visitor should know. Tips go privately to the LakeRipple editor; nothing is posted automatically. Helpful tips may be featured on this page (we'll use your first name only if you give one).

    Lakes & ponds nearby

    Straight-line distance between lake centers. All California lakes & ponds · All waters in San Bruno