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Routes
Bike touring routes & trails
United States
California
San Mateo County
San Bruno

Crystal Springs Regional Trail

Moderate

2.8

(11)

48

riders

Crystal Springs Regional Trail

01:41

27.5km

250m

Cycling

Cycle the Crystal Springs Regional Trail, a 17.1-mile moderate route with 832 feet of elevation gain, offering scenic views of San Andreas L

Last updated: February 26, 2026

Waypoints

A

Start point

Parking

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1

264Β m

San Andreas Trail

Highlight (Segment) β€’ Trail

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

Tip by

2

5.95Β km

San Andreas Lake

Highlight β€’ 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

3

11.3Β km

Lower Crystal Springs Reservoir

Highlight β€’ 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

B

27.5Β km

End point

Parking

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Way Types & Surfaces

Way Types

21.2Β km

3.97Β km

2.24Β km

< 100Β m

< 100Β m

Surfaces

25.8Β km

1.49Β km

226Β m

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Elevation

Elevation

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

Highest point (220Β m)

Lowest point (90Β m)

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Weather

Powered by Foreca

Wednesday 6 May

17Β°C

11Β°C

0Β %

Additional weather tips

Max wind speed: 23.0Β km/h

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This route was planned by komoot.

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Frequently Asked Questions

What is the terrain like for cycling on the trail?

The trail offers varied terrain. The northern San Andreas segment has a paved path with gentle rolling hills, but a 0.6-mile section is unpaved gravel and steeper, which cyclists should bypass via Skyline Boulevard. The popular Sawyer Camp segment is mostly wide, paved, and flat, suitable for all skill levels. The southernmost Crystal Springs segment is unpaved dirt, primarily for walkers and equestrians; cyclists can use the parallel CaΓ±ada Road shoulder instead.

Is the trail suitable for beginners or families?

Yes, particularly the Sawyer Camp segment, which is wide, paved, and largely flat, making it ideal for beginners and families. Some other sections, like parts of the San Andreas segment, have gentle rolling hills. However, cyclists should be aware of unpaved sections in the San Andreas and Crystal Springs segments that are not suitable for touring bikes.

What unique features or landmarks can I see along the way?

You'll find several notable features. Along the San Andreas Trail, you'll ride atop the San Andreas Rift Zone with views of San Andreas Lake and Lower Crystal Springs Reservoir. The Sawyer Camp segment features the 600-year-old Jepson Laurel, the largest and oldest California laurel. Further south, near the Crystal Springs segment, you can visit the impressive Pulgas Water Temple and the beautiful Filoli Estate.

Are there any specific days when cycling is particularly enjoyable?

Yes, CaΓ±ada Road, which runs parallel to the unpaved Crystal Springs segment, is closed to vehicle traffic on Sundays from 9 AM to 3 PM. This creates wide, car-free bike lanes, offering a unique and very enjoyable cycling experience without motorized vehicles.

What kind of wildlife might I encounter?

The trail is rich in wildlife. You might spot deer, squirrels, coyotes, and bobcats. Occasionally, rattlesnakes or even mountain lions are seen. The area is also home to several rare, threatened, and endangered species, including the San Francisco garter snake.

Is the trail dog-friendly?

The provided information does not specify rules regarding dogs on the Crystal Springs Regional Trail. It's best to check the official San Mateo County Parks website or local signage for current regulations on pets before your visit.

Do I need a permit or pay an entrance fee to access the trail?

The Crystal Springs Regional Trail is part of the San Francisco Peninsula Watershed. The provided information does not mention any specific permits or entrance fees required for accessing the trail itself. However, it's always a good idea to check the official San Mateo County Parks website for any updates or specific regulations.

Where can I park to access the trail?

The trail is divided into segments, and parking access varies. The popular Sawyer Camp segment is easily accessible, though specific parking lots are not detailed. Given the trail's length and popularity, multiple access points with parking are likely available along its course. It's recommended to check local maps or the official park website for specific trailhead parking locations.

What is the best time of year to cycle this route?

The trail is generally enjoyable year-round due to California's mild climate. However, spring and fall often offer the most pleasant temperatures for cycling. Summer can be warm, and winter might bring occasional rain, though sunny days are still common. Always check the weather forecast before you go.

Are there restrooms or water facilities along the trail?

Restroom facilities and picnic areas are available along the trail. However, access to drinking water is not universally provided, so it's advisable to bring your own water, especially for longer rides.

Does the trail connect with other paths?

Yes, the route officially includes sections of the Crystal Springs Regional Trail, Skyline Boulevard, Sawyer Camp Trail, and San Andreas Trail. This allows for varied cycling experiences and potential connections to other areas.

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