Bodega Bay’s natural features have been shaped by the San Andreas Fault, which runs parallel to the coast coming ashore at Bodega Head. The fault is the boundary between the Pacific plate and the North American continental plate. Bodega Head provides visual evidence for the theory that it is part of a land mass that once lay due west of the Bakersfield area – the gray and white speckled rock so evident on Bodega Head is common locally west of the fault, but is only found east of the fault until the Tehachapi mountains, 300 miles to the south.
Bodega Head, a peninsula that forms the protective arm between the Pacific Ocean and the bay, is the most prominent of the natural features of Bodega Bay. Connecting the granite headlands to the mainland are sand dunes. Inside the dunes are the harbor and the inner bay. All along the Sonoma Coast, steep rocky bluffs rise from coves and beaches. Atop the bluffs, grasslands rise more gently to the coastal ridges. The coastal waters remain at a fairly constant temperature throughout the year – ranging from the high 50s to the low 50s.
ABAG, the Association of Bay Area Governments, is the regional planning and services agency for the nine-county San Francisco Bay Area