Mailing Address:Sibley Volcanic Regional Preserve
2960 Peralta Oaks Court
Oakland CA 94609
Round Top, one of the area's highest peaks, is made up of lava and volcanic debris left over from a 10-million-year-old volcano. During the past 10 million years, massive tectonic forces on the Hayward and Moraga earthquake faults uplifted the Berkeley hills, folding bedrock formations and tilting the Round Top volcano complex on its side.
Softer sedimentary rock from the Orinda Formation eroded away, exposing the Round Top volcano. In addition, quarrying in the north half of the preserve has revealed cross sections of the bedrock geology, providing an unsurpassed outdoor laboratory for studying volcanism in the Central Coast Ranges.
Most trails are hiking and equestrian only. A few trails are multi-use. Dogs are permitted at Sibley, but are not allowed on adjacent Huckleberry trails. A visitor center at the park shelves self-guided tour brochures so guests can stroll the park and learn of its historic significance at their own leisure.
Bicycles are not allowed on narrow-gauge trails, except on the Skyline Trail between the Sibley visitor center and Old Tunnel Road. Bicycles are allowed on the wider-gauge fire trails and paved roads, but are not allowed on Round Top Road from the fork .15 mile east of the
The Sibley Backpack Camp is a small, primitive hike-in site (NO VEHICLE ACCESS) for a maximum of 15 campers, a moderate 0.2 mile walk from the parking lot. The site has 160 degree views of Mount Diablo, Volmer Peak and Tilden Park. There are only two tent pads - approximately10'x25' and 10'x20'. Site has 2 picnic tables, 1 serving table, and a pit toilet. No fires/BBQ allowed; only camp stoves allowed. Drinking water is 0.2 miles from camp. Dogs are allowed in camp on leash, must be under owner's control at all times, and must not disturb other animals or park visitors. Bikes are allowed on the fire trail.
Vehicles must be parked in the staging area and display a valid overnight parking permit: 3 parking permits are included in the reservation and will be mailed 5 days in advance. No additional parking permits are available.
Reservation must be completed at least 5 days in advance.
To call the park: 1-888-EBPARKS, option 3, ext. 4554
Sibley Volcanic Regional Preserve is located in Oakland, near many attractions in the East Bay Area.
TO RESERVE OR TO MAKE A PAYMENT, call East Bay Regional Park District Reservations Department 1-888-327-2757, option 2.