Estero de San Antonio State Marine Recreational Management Area

Estero de San Antonio is a stream in the northern California counties of Marin and Sonoma which empties into Bodega Bay.

Dillon Beach is a census-designated place (CDP) in Marin County, California, United States. It is located 3.25 miles (5.2 km) west of Tomales, at an elevation of 89 ft (27 m). The population was 246 at the 2020 census. Dillon Beach was named after the founder, George Dillon, who settled there in 1858. The area includes a public access beach, as well as a private beach resort, the only private beach in California.

Bodega Bay (Spanish: Bahía Bodega) is a shallow, rocky inlet of the Pacific Ocean on the coast of northern California in the United States. It is approximately 5 mi (8 km) across and is located approximately 40 mi (60 km) northwest of San Francisco and 20 mi (32 km) west of Santa Rosa. The bay straddles the boundary between Sonoma County to the north and Marin County to the south. The bay is a marine habitat used for navigation, recreation (including swimming and surfing, especially by the Dillon Beach area), and commercial and sport fishing (including shellfish harvesting).Bodega Bay is protected on its north end from the Pacific Ocean by Bodega Head, which shelters the small Bodega Harbor and is separated from the main bay by a jetty. The San Andreas Fault runs parallel to the coastline and bisects Bodega Head, which lies on the Pacific Plate; the town is on the North American Plate. The village of Bodega Bay sits on the east side of Bodega Harbor. The bay connects on its south end to the mouth of Tomales Bay. Streams flowing into Bodega Bay include the Estero de San Antonio and the Americano Creek. Accessible beaches on Bodega Bay include Doran Regional Park (on the jetty) and Pinnacle Gulch. Apart from the harbor, all of Bodega Bay lies within the boundaries of the Gulf of the Farallones National Marine Sanctuary.

Tomales Point is the North-Western tip of Point Reyes Peninsula. Bodega Bay is to the North, Tomales Bay is to the East, and the Pacific Ocean is to the West. The point is accessible only via a 9.5 mile hike (out and back) along Tomales Point Trail. The region is home to a tule elk population.

Americano Creek is a 7.5-mile (12 km) long westward-flowing stream in the California counties of Sonoma and Marin. It flows into the Estero Americano, a 9.2 mi (15 km) long estuary, and thence to the Pacific Ocean. This article covers both watercourses.

Estero Americano State Marine Recreational Management Area (SMRMA) is a marine protected area that splits Sonoma and Marin counties on California’s north central coast. The marine protected area covers 0.15 square miles. Estero Americano SMRMA prohibits the take of all living marine resources, except the recreational hunting of waterfowl, unless otherwise restricted by hunting regulations.

Bird Rock is a rock formation and a small Pacific island west of Tomales Point in Marin County, California that is roughly 2 acres (0.8 ha). A seabird colony, the island is covered with a layer of guano. Cormorants are common on the island, and ashy petrels were found breeding there in 1972.

East Bay Walls, also known as the Berkeley Mystery Walls, is a misnomer, as there are many such crude walls throughout the hills surrounding the San Francisco Bay Area, and go as far as Chico and Red Bluff California. In places, they are up to a meter high and a meter wide and are built without mortar; the walls run in sections anywhere from a few meters to over a half mile long. The rocks used to construct the walls are a variety of sizes. Some are basketball-sized rocks, while others are large sandstone boulders weighing a ton or more. Parts of the wall seem to be just piles of rocks, but in other places it appears the walls were carefully constructed. The exact age of the walls is unknown, but they have an old appearance. Many of the formations have sunk far into the earth, and are often completely overgrown with different plants.

Rancho Blucher was a 26,759-acre (108.29 km2) Mexican land grant in present day Marin and Sonoma County, California given in 1844 by Governor Manuel Micheltorena to Jean Jacques Vioget. The rancho is named for the Prussian field marshal Gebhard Leberecht von Blücher. The grant extended along the coast from Estero Americano on the north and to Estero de San Antonio on the south.

Running Fence was an installation art piece by Christo and Jeanne-Claude, which was completed on September 10, 1976. The art installation was first conceived in 1972, but the actual project took more than four years to plan and build. After it was installed, the builders removed it 14 days later, leaving no visible trace behind.

Valley Ford is an unincorporated community and census-designated place (CDP) in western Sonoma County, California, United States. It is located on State Route 1 north of San Francisco. Like all of Sonoma County, Valley Ford is included in both the San Francisco Bay Area and the Redwood Empire. The village lies just north of Americano Creek, about 5 mi (8 km) from the Pacific Ocean. It is 7 mi (11 km) north of Dillon Beach, California, 9 mi (14 km) east of the town of Bodega Bay and 20 mi (32 km) southeast of Jenner, California. The Estero Americano is protected by the Estero Americano State Marine Recreational Management Area.

Fallon, California is an unincorporated community in Marin County, California Just west of State Route 1 along the abandoned North Pacific Coast Railroad.