12.8 miles one-way (includes 2.9 miles to Sneath Lane trailhead); car shuttle possible
From: Quarry Road in San Mateo
To: Sneath Lane in San Bruno
In this remote open space, dedicated volunteers will lead you through dense forests and over hilly grasslands with extensive views of the entire Bay Area. This trip is a unique opportunity to experience the 23,000-acre watershed, a state Fish and Game Refuge and home to the highest concentration of rare, threatened, and endangered species in the Bay Area. The pristine property contains Crystal Springs, Pilarcitos, and San Andreas Reservoirs.
The SF Crystal Springs Watershed trail is only accessible by reservation, with a docent-led group. Check availability and make reservations at the SFPUC’s Fifield-Cahill Ridge Trail page.
The Skylawn Memorial Park Ridge Trail is open during regular business hours (approximately 7AM – 6PM). Docents are not required as long as you stay on the cemetery property.
Elevation Gain/Loss 1,725 feet/1,490 feet
OuterSpatial Mobile Map: Click Here
Must have the OuterSpatial app for the link to take you directly to the mobile map page.
This trail description is excerpted from the 2019 Guidebook. For details on all trails, trailheads and more buy the book from Wilderness Press.
For more resources to plan your trip, visit our Trail Tools page.