The Crystal Springs Regional Trail is a developing network made up of three distinct portions: the San Andreas segment, Sawyer Camp segment and Crystal Springs segment. The two northern segments are wide, flat, paved trails winding around the eastern shore of San Andreas Lake and the Lower Crystal Springs Reservoir, while the southern segment is a skinnier dirt trail that follows Cañada Road and the Upper Crystal Springs Reservoir and is limited to hikers, joggers and equestrian users only.
The San Andreas segment extends from San Bruno Avenue on the north to Hillcrest Boulevard near the southern end of San Andreas Lake, where it seamlessly connects to the Sawyer Camp segment. The southern 0.7 mile of the San Andreas segment has a gravel surface that is not open to bicycles; cyclists must instead detour to the frontage road (Skyline Boulevard) east of Interstate 280 to bridge the small gap.
Both the San Andreas and Sawyer Camp segments pass close to San Andreas Lake, offering sweeping scenic views. Continue on the Sawyer Camp segment for additional stunning views of the Lower Crystal Springs Reservoir. The trail is historic, too: it follows the path of the old wagon route that was once the main travel lane between Half Moon Bay and San Francisco. Due equally to its jaw-dropping scenery and fascinating history, this portion of the Crystal Springs Regional Trail is by far the most popular trail in San Mateo County's park system.
After a short gap, the Crystal Springs segment begins near the junction of Half Moon Bay Road (State Route 92) and I-280. Less scenic than the two northern trail options, the route is still a convenient option for hikers and equestrian users to add on trail mileage or to access Huddart Park at the trail's southern end.
Parking for the San Andreas segment can be found along Skyline Boulevard (State Route 35) near John Muir Elementary School. For the Sawyer Camp segment, park at the trailhead located at the intersection of Crystal Springs Road and Skyline Boulevard (SR 35). Parking for the Crystal Springs segment is available at the trail's northern endpoint at the intersection of Half Moon Bay Road (SR 92) and Skyline Boulevard (SR 35).