Robert Sibley Volcanic Regional Preserve is located in the
Berkeley Hills just east of
Oakland, California, USA. Though it can only be entered via Oakland, it actually lies almost entirely within
Contra Costa County. The park was one of the first three parks established by the
East Bay Regional Parks District (EBRPD) in 1936. It was originally named
Round Top Regional Park.
Round Top (elevation 1,761 feet/537m) is an extinct volcano in the Berkeley Hills. It is home to several stone
labyrinths of recent origin. The park was re-named for the second president of the EBRPD, Robert Sibley, shortly after his death.
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