1. Start on Fifield Ridge Road, heading NW.
2. 4.1 miSharp left onto Sweeney Ridge Trail, heading W.
3. 1.1 miPass Portola Discovery Site of San Francisco Bay.
4. 350 ftTurn right onto Sneath Lane Trail, heading N.
5. 1.7 miReach Portola Discovery Site of San Francisco Bay, then turn around and head back the way you came.
6. 1.7 miTurn left onto Sweeney Ridge Trail, heading SW.
7. 1.2 miSharp right onto Fifield Ridge Road, heading SE.
8. 4.1 miArrive back at the trailhead.

Each distance is the walk from the previous step. Tap a step for a map of its junction.

Trail map, photos and weather for this hike: www.ambleway.com/hikes/portola-discovery-site-of-san-francisco-bay-out-back-17-km