The Petaluma River is a river in the California counties of Sonoma and Marin that becomes a tidal slough for most of its length. The headwaters are in the area southwest of Cotati. The flow is generally southward through Petaluma's old town, where the waterway becomes navigable, and then flows another 10 mi (16 km) through tidal marshes before emptying into the northwest corner of San Pablo Bay.
The river flowing through Petaluma. View is to the southeast.
The mouth of the Petaluma River. View is to the northeast.
Petaluma River Watershed 2007 Steelhead Trout Biosurvey
The Petaluma River Floodplain, west of Lakeville
Sonoma County, California
Sonoma County is located in the U.S. state of California. As of the 2020 United States Census, its population was 488,863. Its seat of government and largest city is Santa Rosa.
Image: Bodega Bay CA Edit 3194
Image: Sonoma City Hall
Image: Cannons & Chapel, Fort Ross State Historical Monument, CA 7 5 2010 5 59 11 PM
Fort Ross was established by the Russians in 1812.