Fifield-Cahill Ridge Trail Exploration

MODERATE 4 reviews

Fifield-Cahill Ridge Trail Exploration is a 13.1 mile lightly trafficked point-to-point trail located near San Bruno, California that features beautiful wild flowers and is rated as moderate. The trail offers a number of activity options and is accessible year-round. Horses are also able to use this trail.

13.1 miles 2050 feet Point to Point



mountain biking

nature trips

trail running


horseback riding



wild flowers


A permit only section of the Bay Area Ridge Trail. Local nature lovers can enjoy the rare opportunity to hike, bike, or ride their horses through pristine stands of old growth Douglas Fir, evergreen and fragrant coastal scrub while enjoying ridge-top vistas of our watershed lands, reservoirs, the Pacific Ocean and San Francisco Bay. Although this trail is not open for walk-in use by the general public, trained volunteer trail leaders head excursions three days a week. It is a through hike that starts at the Sweeney Ridge Trailhead behind Skyline College and ends at Skyline Quarry near Hwy 92. The majority of the hike sports great views of the Pacific, SF Bay and the Coastal Range. Wildlife spotting should be more favorable than other parks due to less human interference and the wildflowers are stunning in spring. This trip takes some planning in that you need to select a date that is available, get your permits, and arrange for enough vehicles to shuttle your group North to Sweeney Ridge to start the hike.

2 months ago

This place is fantastic. We got a little bit of rain and fog. The beginning is a little strenuous, but once you're up there it's a lot easier. We missed the views but the look and feel of the forest is a great reward. I have to do it on the spring again. Thomas was our volunteer docent, he's an amazing guy. Don't miss this place, it's a jewel. I'll upload some photos.

6 years ago

Nice! Quest does good work. I just uploaded to the phone; I plan to get a group together soon for a ride thru the watershed and Sweeney Ridge.

6 years ago

This is a great hike, you should sign up and take it! The process is daunting ... the Water District seems overrun by lawyers for no good reason. You have to sign a FOUR PAGE list of absurd rules before the hike (example: You may not bring a model airplane). And the time I did the hike, our docent-led group was under the obsessively watchful eyes of the park rangers ... every few miles a pickup truck would appear just to check up on us. They need a serious attitude adjustment, as their paranoia drives people away. Maybe that's the goal.

But don't let them win! The hike is very nice, and you should take it ... despite the silly politics of the place.

6 years ago

OK - with the help of our friends at Everytrail (thanks, Chris!), we've ported over the first of our KQED QUEST Science Hikes to the group. Let us know how it looks, and let us know if you've been here. We'd love to hear about & see things you encountered while you were out there, which we may have missed. The science theme for this hike is "watersheds."