Location: Mount Diablo State Park
Length, Round Trip: 1.2 miles
Trail Type: Out and Back
Best Season: Year-Round
The Fossil Ridge Trail takes hikers up an initial climb providing imposing vistas of the massive main peak of the mountain, as well as of San Ramon Valley in the opposite direction. The road parallels the crest of Fossil Ridge the adventurous may wish to scramble up to the rocky ridge, a sharp hogback (tilted sandstone layer with adjacent layers eroded away) with interesting exposed fossils, rock-garden-like appearance. Dramatic view of Black Hawk Ridge strata across Sycamore Canyon from small path beyond end of road.
The trailhead is located at the Uplands Picnic Area, adjacent to South Gate Road, at junction with small side road to Live Oak Campground.