Two Rock is an

unincorporated community An unincorporated area is a parcel of land that is not governed by a local general-purpose municipal corporation. (At p. 178.) They may be governed or serviced by an encompassing unit (such as a county) or another branch of the state (such as th ...

Sonoma County Sonoma County ( ) is a county 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. Sonoma County comprises the Santa Rosa-Petaluma ...

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

, United States. It is located on

Stemple Creek Stemple Creek is a long, westward-flowing stream in the California counties of Sonoma and Marin, which feeds into the Estero de San Antonio. Its waters ultimately reach Bodega Bay, part of the Gulf of the Farallones National Marine Sanctuary ...

in a rural area west of

Petaluma Petaluma is a city in Sonoma County, California, United States, located in the North Bay region of the San Francisco Bay Area. Its population was 59,776 according to the 2020 census. Petaluma's name comes from the Miwok village named ''Péta ...

. A hill named Dos Piedras (Spanish for "two rocks", above sea level) overlooks the community from the north. The community is named for the two rocks, between which the Mexican trail from San Rafael to Bodega passed. Two Rock had a post office located at the intersection of Bloomfield and Tomales Road, as well as a school 1.3 miles west of the former post office, on Tomales Road. A new school has since been built further east, but the original school building still stands. The main road is Valley Ford Road, which passes northwest–southeast through Two Rock. The

Coast Guard A coast guard or coastguard is a Maritime Security Regimes, maritime security organization of a particular country. The term embraces wide range of responsibilities in different countries, from being a heavily armed military force with cust ...

Training Center Petaluma Training Center Petaluma is a United States Coast Guard, Coast Guard training facility in the northern California counties of Sonoma County, California, Sonoma and Marin County, California, Marin. Formerly the installation was the United States ...

is located just south of Two Rock. Two Rock used to provide basic services to local ranches, but little remains today.

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Unincorporated communities in California Unincorporated communities in Sonoma County, California {{SonomaCountyCA-geo-stub