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San Mateo County

San Mateo

Top 13 Lakes around San Mateo

Best lakes around San Mateo County include several reservoirs that form a significant natural feature of the region. These interconnected lakes, such as the Crystal Springs Reservoir system and San Andreas Lake, provide vital water sources and offer diverse recreational opportunities. The area is characterized by its scenic beauty, extensive trail networks, and geological significance, making it a destination for outdoor activities. Visitors can explore a variety of landscapes, from tranquil waters to riparian woodlands, often with views of the surrounding hills.

Best lakes around San Mateo

  • The most popular lakes is Lower Crystal Springs Reservoir, a lake that is part of the 15-mile Crystal Springs Regional Trail. It offers scenic routes for cycling and walking along its waters.
  • Another must-see spot is San Andreas Lake, a reservoir formed by the San Andreas Fault. Visitors can enjoy its tranquil beauty from the San Andreas Trail or Sawyer Camp Trail, which run along its eastern edge.
  • Visitors also love Oracle Lagoon, a small lagoon offering photo opportunities. Its calm waters reflect the surrounding Oracle Buildings, creating a unique visual experience.
  • San Mateo is known for its reservoirs, natural sag ponds, and man-made lagoons. The region offers a variety of lakes to see and explore, from those with extensive trail systems to smaller, scenic spots.
  • The lakes around San Mateo are appreciated by the komoot community, with 66 upvotes and 6 photos shared for the featured highlights, reflecting their appeal for outdoor activities.

Last updated: April 26, 2026

Lower Crystal Springs Reservoir

Highlight • Lake

The 15-mile Crystal Springs Regional Trail is one of the best mostly paved bike trails with few cars in the Bay Area. It spans from San Bruno to Woodside and is routed along three gorgeous lakes and connector links amid riparian woodlands. On Sundays, you can combine the San Andreas and Sawyer Camp segments to south of Highway 92 to Cañada Road, which is closed to cars for Bicycle Sundays (See komoot.com/tour/11413421)
Speed limit: 15 mph, difficult for high-end road bikes to stay below, so bring a bell: some hikers stand and talk in the center of the trail ;-)
San Andreas segment: From Skyline Boulevard south of San Bruno Avenue the trail drops to the head of San Andreas Lake, with pretty views across to the west of the wilderness slope of Montara Mountain. It rides along the lake 2 miles to an access point near Larkspur and 0.6 miles to another (at Hillcrest) where it connects to the Sawyer Camp segment.
Sawyer Camp segment: This is a gorgeous, easy bike ride, where you drop 400 feet over the span of 6 miles to Crystal Springs Dam. The route descends into riparian woodlands for 2.5 miles to Jepson Laurel picnic grounds, then runs along Crystal Springs Reservoir for 5.2 miles. You can continue another 1.7 miles to Cañada Road for Bicycle Sunday (no cars).
Cañada Road/Crystal Springs segment: South along Upper Crystal Springs Reservoir for 2.1 miles to the Pulgas Water Temple. It continues another 2.1 miles past Filoli Botanical Center and Phleger Estate to Edgewood Road
sfgate.com/outdoors/sundaydrive/article/Crystal-Springs-Trail-links-lakes-woodlands-4723374.php
parks.smcgov.org/crystal-springs-regional-trail

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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.

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Oracle Lagoon

Highlight • Lake

This small lagoon offers an excellent photo opportunity for visitors and photographers alike. Its calm, crystal-clear waters create a stunning mirror-like reflection of the iconic Oracle Buildings that surround it. The tranquil setting, combined with the striking architecture, makes it an ideal spot to capture breathtaking images, especially during sunrise and sunset.

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Bay Trail on Foster City Levee

Highlight (Segment) • Trail

An excellent paved section of the Bay Trail circles around Foster City along the bay, not the shortest but probably the fastest and more interesting route than the alternative along roads branching off here through the center of Foster city.

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Sawyer Camp Recreation Trail

Highlight • Trail

See komoot.de/highlight/172571
The 15-mile Crystal Springs Regional Trail is one of the best mostly paved bike trails with few cars in the Bay Area. It spans from San Bruno to Woodside and is routed along three gorgeous lakes and connector links amid riparian woodlands. On Sundays, you can combine the San Andreas and Sawyer Camp segments to south of Highway 92 to Cañada Road, which is closed to cars for Bicycle Sundays (See komoot.de/tour/11413421 ).
Speed limit: 15 mph, difficult for high-end road bikes to stay below; hikers: please don't stand and talk in the center of the trail.

San Andreas segment: From Skyline Boulevard south of San Bruno Avenue the trail drops to the head of San Andreas Lake, with pretty views across to the west of the wilderness slope of Montara Mountain. It rides along the lake 2 miles to an access point near Larkspur and 0.6 miles to another (at Hillcrest) where it connects to the Sawyer Camp segment.
Sawyer Camp segment: This is a gorgeous, easy bike ride, where you drop 400 feet over the span of 6 miles to Crystal Springs Dam. The route descends into riparian woodlands for 2.5 miles to Jepson Laurel picnic grounds, then runs along Crystal Springs Reservoir for 5.2 miles. You can continue another 1.7 miles to Cañada Road for Bicycle Sunday (no cars).
Cañada Road/Crystal Springs segment: South along Upper Crystal Springs Reservoir for 2.1 miles to the Pulgas Water Temple. It continues another 2.1 miles past Filoli Botanical Center and Phleger Estate to Edgewood Road
- sfgate.com/outdoors/sundaydrive/article/Crystal-Springs-Trail-links-lakes-woodlands-4723374.php
- parks.smcgov.org/crystal-springs-regional-trail

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Tips from the Community

Sue
June 30, 2025, Oracle Lagoon

This small lagoon offers an excellent photo opportunity for visitors and photographers alike. Its calm, crystal-clear waters create a stunning mirror-like reflection of the iconic Oracle Buildings that surround it. The tranquil setting, combined with the striking architecture, makes it an ideal spot to capture breathtaking images, especially during sunrise and sunset.

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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.

1

0

Sue
May 23, 2025, Oracle Lagoon

This small lagoon offers an excellent photo opportunity for visitors and photographers alike. Its calm, crystal-clear waters create a stunning mirror-like reflection of the iconic Oracle Buildings that surround it. The tranquil setting, combined with the striking architecture, makes it an ideal spot to capture breathtaking images, especially during sunrise and sunset.

0

0

Sue
January 20, 2025, Oracle Lagoon

This small lagoon offers an excellent photo opportunity for visitors and photographers alike. Its calm, crystal-clear waters create a stunning mirror-like reflection of the iconic Oracle Buildings that surround it. The tranquil setting, combined with the striking architecture, makes it an ideal spot to capture breathtaking images, especially during sunrise and sunset.

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The Crystal Springs Regional Trail is a top spot for cyclists, featuring mostly paved paths with minimal car traffic. The trail runs through scenic areas like Lower Crystal Springs Reservoir, offering beautiful lake views. On Sundays, you can ride the car-free Cañada Road segment for a more relaxed experience. Be mindful of the 15 mph speed limit, especially around hikers. The Sawyer Camp segment provides a gentle descent and stunning views, perfect for an easy ride through woodlands and along the reservoir.

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1

Sue
January 10, 2025, Oracle Lagoon

This small lagoon offers an excellent photo opportunity for visitors and photographers alike. Its calm, crystal-clear waters create a stunning mirror-like reflection of the iconic Oracle Buildings that surround it. The tranquil setting, combined with the striking architecture, makes it an ideal spot to capture breathtaking images, especially during sunrise and sunset.

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Dirk Rostock
August 31, 2021, Oracle Lagoon

Must be seen 😎

Translated by Google

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Scenic ride on a shared pedestrian footpath.

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Frequently Asked Questions

What are the best trails for walking and cycling around the San Mateo lakes?

The Crystal Springs Regional Trail is highly recommended, offering 15 miles of paved path along the Lower Crystal Springs Reservoir, San Andreas Lake, and Upper Crystal Springs Reservoir. The Sawyer Camp segment is particularly popular for an easy bike ride, descending through riparian woodlands. On Sundays, portions of Cañada Road are closed to cars for "Bicycle Sundays," providing an even more enjoyable experience for cyclists.

Are there any family-friendly activities around the lakes in San Mateo County?

Yes, many areas around the San Mateo lakes are family-friendly. The extensive paved trails of the Crystal Springs Regional Trail system are suitable for all ages for walking and cycling. San Andreas Lake and Lower Crystal Springs Reservoir offer scenic, easy routes. Additionally, Oracle Lagoon provides a unique spot for photos and a pleasant stroll.

What is the best time of year to visit the San Mateo lakes for outdoor activities?

The San Mateo lakes can be enjoyed year-round. Spring and fall offer pleasant temperatures for hiking and cycling, with lush greenery in spring and vibrant colors in autumn. Summer is also popular, though it can be warmer. Winter provides a quieter experience, and trails are generally accessible, though checking weather conditions is always advisable.

Can I go fishing in the lakes around San Mateo?

Fishing is permitted in designated areas of the Crystal Springs Reservoirs, which are known for trout and bass. However, shore access is restricted in many areas to protect the watershed. Always check local regulations and obtain any necessary permits before fishing.

Are there any dog-friendly trails near the San Mateo lakes?

While specific trails directly adjacent to the main reservoirs like Crystal Springs and San Andreas often have restrictions to protect water quality, many nearby parks and trails in San Mateo County are dog-friendly. Always look for signage regarding leash requirements and pet waste disposal.

What unique natural or historical features can I find at the San Mateo lakes?

San Andreas Lake is particularly notable as it was originally a natural sag pond formed by the San Andreas Fault, offering a unique connection to geological history. The entire Crystal Springs Reservoir system is also a vital water source for the region, surrounded by diverse wildlife and riparian woodlands.

Is there parking available at the San Mateo lakes?

Yes, parking is available at various access points along the Crystal Springs Regional Trail, which runs alongside the main lakes. Specific parking lots can be found near popular trailheads for the San Andreas and Sawyer Camp segments. It's advisable to arrive early on weekends, especially during peak seasons, as spots can fill up quickly.

What kind of wildlife can be seen around the San Mateo lakes?

The natural settings around the lakes are home to diverse wildlife, making them appealing for nature enthusiasts and birdwatchers. You might spot various bird species, deer, and other small mammals, especially in the quieter, less developed areas and riparian woodlands.

Are there any easy hiking routes suitable for beginners around the San Mateo lakes?

Yes, the easy hikes around San Mateo guide features several accessible options. The Sawyer Camp segment of the Crystal Springs Regional Trail, running alongside Lower Crystal Springs Reservoir, is a gentle, mostly flat paved path perfect for beginners and casual walkers. Other easy routes include Seal Point Park and Coyote Point Shoreline Trail.

Can I kayak or boat on the lakes in San Mateo County?

To protect the water quality, swimming and boating are generally not permitted on the main reservoirs like San Andreas Lake and the Crystal Springs Reservoirs, as they serve as vital drinking water sources. Recreational activities are primarily focused on the surrounding trails.

What cycling routes are available near the San Mateo lakes?

The cycling around San Mateo guide offers several routes. The Crystal Springs Regional Trail is excellent for cycling, with its paved paths along the reservoirs. For a unique experience, consider the Cañada Road segment on Sundays when it's closed to cars. Routes like the 'Jepson Laurel – San Andreas Lake loop' are also popular for exploring the area by bike.

Are there any wheelchair-accessible paths around the San Mateo lakes?

Yes, the paved sections of the Crystal Springs Regional Trail, particularly along Lower Crystal Springs Reservoir and San Andreas Lake, are generally flat and well-maintained, making them suitable for wheelchairs. Oracle Lagoon also offers accessible pathways.

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