Two Rock, California

Petaluma Center is an unincorporated community and census designated place (CDP) in Sonoma County, California, United States. It covers the residential population of the Coast Guard facility Training Center Petaluma. Per the 2020 census, the population was 709.

Training Center Petaluma is a Coast Guard training facility in the northern California counties of Sonoma and Marin. Formerly the installation was the United States Army "Two Rock Station" . Approximately 4,000 military students train there each year. It is the only Coast Guard training center or large installation without a major operational component (air station, motor life boat station, etc) or waterfront. The training center is located in a rural area north of San Francisco at 38.25°N 122.79°W / 38.25; -122.79. It is about 9 mi (14 km) from the coast and 9 mi (14 km) west of the city of Petaluma, California, west of the junction of Tomales Road and Valley Ford Road, just south of Stemple Creek and the village of Two Rock, California. The facility occupies more than 800 acres (320 ha) of land, which include 129 family housing units and 90 other buildings. A small town, the training center also has a movie theater, RV and camping spots, over 10 miles of hiking and walking trails, barbershop and hair salon, tailor, chapel with regular services, bowling alley, and other amenities. Public safety is provided by a Coast Guard Fire Department and a mix of Coast Guard Military Police and contracted private security, though emergency medical services including advanced life support and ambulance transport is provided by local civilian agencies. An on-installation medical clinic provides non-emergency general outpatient healthcare for active duty and reserve service members, while dependents and retirees are seen on the local civilian network.

Rancho Laguna de San Antonio was a 24,903-acre (100.78 km2) Mexican land grant in present-day Marin County and Sonoma County, California given in 1845 by Governor Pío Pico to Bartolomé Bojorquez. The grant encompassed Chileno Creek and Laguna Lake.

Rancho Roblar de la Miseria was a 16,887-acre (68.34 km2) Mexican land grant in present-day Sonoma County, California given in 1845 by Governor Pío Pico to Juan Nepomuceno Padilla. "El Roblar de la Miseria" means "The Oak of the Misery". The grant extended along the Petaluma River from Hessel, Roblar, Liberty and Two Rock south to Petaluma.

Laguna Lake is a shallow natural lake at the head of the Chileno Valley. It retains some water year round. The 200 acres (81 ha) lake is 0.5 miles (1 km) wide and 2 miles (3 km) long, straddling the Sonoma-Marin county line in northern California, United States. It is the source of Chileno Creek which flows 10 kilometres (6.2 mi) west to Walker Creek.It was included in the Rancho Laguna de San Antonio Mexican land grant, which was given to Bartolomé Bojorquez in 1845.Laguna Lake is used extensively for migrating and breeding waterfowl and Agriculture. agr.

Washoe House is a historic roadhouse in Sonoma County, California in the United States. It is located west of Cotati, California at the juncture of Stony Point Road and Roblar Road. It lies near the headwaters of Washoe Creek and is the defining landmark of the unincorporated community of Stony Point (not to be confused with Stony Point, California, a former name of Lakeport). It is a designated Sonoma County Historic Landmark.

Bloomfield is a census-designated place in Sonoma County, California, U.S. It is located in a rural area about 11 miles (18 km) southwest of Santa Rosa at the junction of Bloomfield Road and Valley Ford Road. Americano Creek flows westward along the south edge of the town.

Chileno Creek is a stream in western Marin County, California, United States. It originates west of Petaluma, California at 220-acre Laguna Lake which straddles Marin and Sonoma Counties, from which it flows west 6.25 kilometres (3.88 mi) before joining Walker Creek, a tributary of Tomales Bay.

The Petaluma Gap is a geographical region in Sonoma County, California which extends in a band from the Pacific Ocean to San Pablo Bay. It is an area of low land 22 to 31 miles (35 to 50 kilometers) wide in the coast ranges of the northern San Francisco Bay Area. The western edge of the gap is located in the coastal lowlands between Bodega Bay and Tomales Bay. The eastern edge of the gap is located at San Pablo Bay around the mouth of the Petaluma River. The city of Petaluma is near the center of the gap. The Petaluma Gap affects wind patterns (and thus microclimates and air quality) in the San Francisco Bay Area. Fresh marine air generally blows eastward through the gap, branching into southward and northward streams which blow toward the Carquinez Strait and Santa Rosa respectively. The southward stream brings marine air overland into the central Bay Area from the northwest. Warm air rises from the land and allows cold, moist air, plus winds and fog to move into the area.

Rancho Bolsa de Tomales was a Mexican land grant in present day Marin County and Sonoma County, California given in 1846 by Governor Pío Pico to Juan Nepomuceno Padilla. The name means "the Pool of the Tomales Indians," which referred to Burbank’s Lake. The grant extended along the Pacific coast from Estero de San Antonio south to Walker Creek, and encompassed present day Tomales. Stemple Creek transversed the property. The land claim was rejected as fraudulent by the US Supreme Court.

Five Creek is a westward flowing stream that rises in the city of Rohnert Park, California, United States and discharges to the Laguna de Santa Rosa. The creek is channelized as it flows through the city and runs in an artificially rectilinear fashion. Considered waters of the United States as a jurisdictional matter, Five Creek has potential habitat for the California red-legged frog and the Western pond turtle.The name probably originated as a misreading of "Fire Creek," the name found on older maps.

Washoe Creek is a perennial stream located in Sonoma County, California. It is about 2 mi (3 km) long and discharges to the Laguna de Santa Rosa.Washoe Creek rises in the low lying Meacham Hills southwest of the city of Cotati. It descends to the northeast, flowing under Roblar Road and Stony Point Road. It then turns northward and parallels Stony Point Road, crossing under West Sierra Avenue and Madrone Avenue. Gravenstein Highway (State Route 116) crosses the creek, which then enters an artificial channel. Gossage Creek enters from the west, and shortly thereafter the creek ends at a confluence with the Laguna de Santa Rosa just west of Rohnert Park. The original native riparian vegetation was likely riparian woodland, with Valley Oak savanna and grassland on the upland east and west. The native habitats have been largely altered or replaced, due to the modern uses of grazing, agriculture, and urban development. In stream nitrate concentrations are noticeably higher for Washoe Creek than other watercourses within the Laguna de Santa Rosa watershed. The lower reach is under consideration for a restoration project.