Highlight • Lake
San Andreas Lake
Road cycling
5.0
(31)
Cycling
5.0
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San Andreas Lake is a significant reservoir nestled on the San Francisco Peninsula in San Mateo County, California, adjacent to the cities of Millbrae and San Bruno. Situated directly atop the famous San Andreas Fault, which was named after the valley where the lake lies, it holds profound geological and historical importance. This crucial water source for the region sits at an elevation of approximately 138 to 139 meters above sea level.
Visitors consistently praise the lake's serene and peaceful environment, offering a quiet escape despite its proximity to urban areas. The sweeping views of the water and surrounding hills are a major draw, providing a picturesque backdrop for outdoor activities. Many are fascinated by the unique experience of walking or biking directly on one of the world's most famous fault lines, making it a place of both natural beauty and scientific interest.
While San Andreas Lake is a protected watershed, meaning water-based activities like swimming, boating, and fishing are prohibited to maintain water quality, it offers excellent opportunities for land-based recreation. The terrain around the lake features well-maintained, paved trails, making it accessible for various fitness levels. Parking is generally available at trailheads, and it's advisable to check specific access points for the San Andreas Lake trails before your visit.
The lake is enjoyable year-round, with pleasant conditions for hiking, jogging, and biking. The paved trails along the eastern shores, such as the San Andreas Segment of the Crystal Springs Regional Trail and the longer Sawyer Camp Trail, are particularly popular. These trails provide an ideal setting for family-friendly hikes and offer a chance to observe local wildlife, making it a great destination for all ages.
For those looking to explore the area, the San Andreas Segment of the Crystal Springs Regional Trail offers a pleasant 2-mile path, while the connecting Sawyer Camp Trail extends for about 6 miles, crossing the rift valley on the San Andreas Dam. These routes provide scenic views and a unique perspective on the geological features shaped by the San Andreas Fault, making them popular choices for those seeking San Andreas Lake popular trails routes.
Many visitors highlight the sense of tranquility found here, often spotting various bird species or enjoying the calm reflections on the water. The historical significance, from its origins as a natural sag pond to its role in the 1906 San Francisco earthquake, adds another layer of appreciation for this natural monument. It's a place where you can connect with nature and history simultaneously.
Whether you're interested in a leisurely stroll, a brisk jog, or a scenic bike ride, San Andreas Lake offers a variety of routes to discover. To find the perfect path for your adventure, including options for San Andreas Lake family friendly hikes or dog friendly trails, explore the many routes available on komoot and plan your visit to this remarkable California landmark.
Tips
May 29, 2025
Cycling
August 16, 2016
Cycling
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
komoot.de/tour/11413421
December 27, 2016
Road cycling
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Nearby routes
Best routes near San Andreas Lake
5.0
(1)
123
riders
104km
05:13
1,490m
1,490m
This difficult 64.8-mile road cycling loop on the San Francisco Peninsula offers diverse scenery and 4902 feet of elevation gain.
4
riders
49.7km
02:35
430m
430m
Cycle the moderate 30.9-mile Crystal Springs Regional Trail Loop, gaining 1419 feet of elevation with scenic reservoir views in San Mateo Co
4.0
(1)
81
riders
47.0km
02:16
610m
610m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
Details
Informations
Elevation 140 m
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Max wind speed: 23.0 km/h
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Frequently Asked Questions
What are the best trails for a longer hike or bike ride around San Andreas Lake?
For a longer excursion, the Sawyer Camp Trail is highly recommended. It extends for about 6 miles (approximately 9.6 km) and connects with the 2-mile (3.2 km) San Andreas Segment of the Crystal Springs Regional Trail. This combined route offers a scenic journey along the eastern shores of the lake, crossing the rift valley on the San Andreas Dam and leading towards the Lower Crystal Springs Reservoir. Both trails are paved and suitable for hiking, jogging, and biking.
How challenging are the trails around San Andreas Lake?
The trails around San Andreas Lake, including the San Andreas Segment and Sawyer Camp Trail, are generally considered easy to moderate. They are well-maintained and paved, making them accessible for various fitness levels. While there are some gentle inclines, significant elevation changes are minimal, making them suitable for leisurely walks, jogs, and bike rides.
Where is the best place to park for trail access at San Andreas Lake?
Parking is generally available at designated trailheads. A popular access point for the Sawyer Camp Trail, which runs along San Andreas Lake, is the Sawyer Camp Trail North Entrance, located off Skyline Boulevard (Highway 35) near Millbrae. It's advisable to arrive early, especially on weekends and holidays, as parking lots can fill up quickly.
Is public transportation available to San Andreas Lake?
Yes, public transportation can get you close to San Andreas Lake. You can typically use SamTrans bus services to reach areas near Millbrae or San Bruno, from which you might have a short walk or need to connect to a local ride-sharing service to reach specific trailheads. For detailed routes and schedules, it's best to check the SamTrans website or a public transit planner.
Is San Andreas Lake suitable for a winter hike?
Yes, San Andreas Lake is enjoyable year-round, including in winter. The paved trails remain accessible, and the cooler temperatures can make for a pleasant hiking or biking experience without the summer heat. While rain is possible, the mild California winters often offer clear, crisp days perfect for outdoor activity. Always check the local weather forecast before heading out.
Are dogs allowed on the trails around San Andreas Lake?
Yes, dogs are permitted on leash on the Sawyer Camp Trail and the San Andreas Segment of the Crystal Springs Regional Trail. Please ensure your dog is kept on a leash at all times and that you clean up after them to help maintain the pristine condition of this protected watershed area.
What kind of wildlife can be observed at San Andreas Lake?
San Andreas Lake is home to various wildlife, particularly bird species. Visitors often spot waterfowl on the lake, as well as raptors soaring overhead. Keep an eye out for deer, rabbits, and other small mammals in the surrounding natural areas. Remember to observe wildlife from a distance and avoid disturbing their natural habitats.
Can I swim or fish in San Andreas Lake?
No, swimming, boating, and fishing are strictly prohibited in San Andreas Lake. As a crucial component of the San Francisco Public Utilities Commission's (SFPUC) regional water supply system, the lake is a protected watershed. These restrictions are in place to maintain water quality for nearly a million customers in San Francisco and northern San Mateo County.
Are there any cafes, pubs, or accommodation options near San Andreas Lake?
While San Andreas Lake itself is a natural area without commercial establishments, the adjacent cities of Millbrae and San Bruno offer a wide range of amenities. You'll find numerous cafes, restaurants, pubs, and various accommodation options, from hotels to motels, just a short drive from the lake's trailheads.
What geological features can I observe along the trails at San Andreas Lake?
San Andreas Lake lies directly on the famous San Andreas Fault, offering a unique opportunity to observe its geological impact. As you traverse the trails, particularly the Sawyer Camp Trail which crosses the San Andreas Dam, you are walking directly over the fault line. You can observe the distinctive landscape created by the fault's activity, such as the rift valley itself, and appreciate the profound tectonic forces that shaped the region.
Is San Andreas Lake suitable for families with young children?
Absolutely! The paved and relatively flat trails, such as the San Andreas Segment and Sawyer Camp Trail, are very family-friendly. They are suitable for strollers and young children, offering a safe and enjoyable environment for a leisurely walk or bike ride. The serene environment and opportunities to observe nature make it a great outing for all ages.