Sibley Volcanic Regional Preserve

There are about ten miles of trails including a trail leading up to Round Top (elevation 1763 ft.) that is made up of lava and volcanic debris left over from a 10-million-year-old volcano. Other trails pass through ridgelines and ponds.  The visitor center offers a self-guided brochure for observing the local geology. There is a bathroom and drinking fountain by the visitor center.

Operating Hours

Open from 7 AM to 6 PM (winter months) or 10 PM (summer months).

Disabled Access

Round Top and Quarry roads are paved and there is a 600-foot, paved wheelchair path north of the visitor center that ends at a viewing platform.


Click for Map


Sibley Staging Area

6800 Skyline Blvd

Visit Google Maps for this Address


From Highway 24 take the Fish Ranch Road immediately east of the Caldecott Tunnel. Continue 0.8 miles to Grizzly Peak Boulevard. Turn left and go 2.4 miles on Grizzly Peak to Skyline Boulevard. Turn left and drive 0.1 mile to the preserve entrance on the left. The closest bus line, AC Transit #305, runs only on Tuesdays and Thursdays, from mid-morning to mid-afternoon.

Contact Info

Phone 1-888-327-2757 option 3, extension 4554.