Red Rock Island, Private island in San Francisco Bay, California
Red Rock Island is a small landmass in San Francisco Bay distinguished by a prominent hill of reddish soil that rises prominently above the water. The island remains undeveloped with no permanent buildings or infrastructure of any kind.
The island was initially known to Russian fur trading operations before passing into private ownership during the 1800s. It later served as a hunting preserve before legal restrictions limited its use.
The island intersects three California counties - San Francisco, Marin, and Contra Costa - each maintaining different zoning regulations for development.
Access to the island requires a private boat since no public landing facilities exist. Plan ahead to understand any restrictions on who may visit and what activities are permitted.
The island straddles a boundary between three counties, each with different zoning rules that affect how it can be used. This legal complexity has helped keep the place largely unchanged.
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