Sibley Volcanic Regional Preserve

Sibley Volcanic Regional Preserve

6800 Skyline Blvd.
Oakland, California 94611
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Local Phone: (888) 327-2757

East Bay Regional Park District 80 years logoEast Bay residents have a volcano in their backyard at Sibley Volcanic Regional Preserve.

Originally called Round Top Park, Sibley shares with Temescal and Tilden the distinction of being one of the East Bay Regional Park District's original parks. The preserve was later named in honor of Robert Sibley, who helped found the District and served for 10 years on its board of directors.

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.

Several trails provide access throughout the preserve. The 31-mile East Bay Skyline National Recreation Trail, part of the Bay Area Ridge Trail system, traverses the preserve along the ridgeline between Wildcat Canyon and Anthony Chabot Parks.

Round Top Road goes from the Sibley visitor center to the top of Round Top.

Round Top Loop Trail circles Round Top peak.

Volcanic Trail, once a quarry haul road, contains most of the stops on the self-guided volcanic tour.

From Old Tunnel Road on the northwest side of the park, the paved Quarry Road ascends and meets the east end of Volcanic Trail. Quarry Trail connects the middle of Volcanic Trail to a point lower down on Quarry Road. Finally, Pond Trail is a short trail segment that descends to a couple of ponds on the north side of the preserve.

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 visitor center to the top of Round Top.

Dogs welcome.
Parking: Free
Dog fee: None
Hours: Open between 5 a.m. and 10 p.m. unless otherwise posted or permitted.

Pretty Pittie at Sibley Volcanic Regional Preserve - Photo Credit: @ac_sivs
Pretty Pittie at Sibley Volcanic Regional Preserve - Photo Credit: @ac_sivs
Oakland is surrounded by hills, and the hills—luscious green at this time of year—are laced with hiking trails. You don’t have to go far from downtown Oakland to access one of the close-in preserves managed by the East Bay Regional Park District, which oversees more than 65 open-space areas with 1,250 miles of trails between them. A perk you won’t find on many other public lands: more »
Dogs Permitted Off Leash sign
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