Black Mountain via PG&E Trail
Distance
9.8 mi
Elevation gain
2,080 ft
Duration
4–5 hrs
Surface
Dirt singletrack, rocky fire road
✓ Dogs allowed on leash
About this hike
Black Mountain (2,800 ft) is the high point of the Rancho San Antonio system and one of the most rewarding strenuous day hikes in the South Bay. The PG&E Trail climbs through shaded canyons and open chaparral ridgelines, finishing at a bald summit with views stretching to the Pacific and across the South Bay.
Highlights
- ✦Summit views to the Pacific and across the entire South Bay
- ✦Rich wildlife corridor: deer, turkey vultures, and rare serpentine wildflowers
- ✦Shaded creek drainage on the lower half keeps it cool in summer
- ✦Quieter than Mission Peak despite comparable distance
Practical tips
- →Arrive by 8 am on weekends — Rancho San Antonio fills early
- →The upper section is fully exposed; hat and sunscreen essential
- →Water is available at Deer Hollow Farm (mid-route) — fill up
- →The descent on PG&E Trail is rocky; trail shoes outperform road shoes here