Tomales Point

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.

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.

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

Estero de San Antonio State Marine Recreational Management Area (SMRMA) is a marine protected area 1.5 miles north of Dillon Beach in Marin County on California’s north central coast. The marine protected area covers 0.09 square miles. Estero de San Antonio SMRMA prohibits the take of all living marine resources, except the recreational hunting of waterfowl, unless otherwise restricted by hunting regulations.

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.

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.

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.

Walker Creek is a northwest-flowing stream in western Marin County, California, United States. It originates at the confluence of Salmon Creek and Arroyo Sausal and empties into Tomales Bay south of Dillon Beach, California.

Hog Island is an island roughly 2 acres (0.8 ha) in size located approximately 5 mi (8 km) south of the entrance to Tomales Bay in the West Marin area of Marin County, California. While waters to its west are deep enough for small ships to enter Tomales Bay, at low tide the shallows to the east may be wadeable to the eastern shore of the bay. Unsuspecting vessels have run aground in that region a number of times. However, as it is some distance from the mouth of Tomales Bay, Hog Island does not experience the large sudden waves that characterize the Tomales Bay Bar entrance region.The name Hog Island reportedly came from a wild 1870s incident, in which a barge carrying a load of pigs caught fire and was grounded on the island to avoid sinking—at which point the pigs escaped onto the island until they were rounded up again. The island lends its name to the Hog Island Oyster Company, which produces shellfish on Tomales Bay, several miles south of Hog Island. The San Andreas fault runs through the center of Tomales Bay, past Hog Island. Local legend claims that Hog Island and nearby Duck Island (also known as "Piglet") were once connected, but separated as a result of the 1906 San Francisco earthquake. While land deeds from the 1880s indicate that the two islands were separate before the earthquake, the two islands are (and have been) intermittently linked by a sand spit exposed at low tide. The Inverness Yacht Club hosts an annual sailboat race around the island. Competing boats sail from the club, around the island, and back to the club again.

Hamlet (also Telmat) is an unincorporated community in Marin County, California. It is located on the northeast shore of Tomales Bay and the Northwestern Pacific Railroad 3 miles (4.8 km) south-southwest of Tomales, at an elevation of 23 feet (7 m).A post office operated at Hamlet from 1876 to 1886. The Telmat post office operated from 1917 to 1931.

Nick's Cove is the site of a long-standing restaurant and vacation camp in Marin County, California. It is on the northeast shore of Tomales Bay 3.25 miles (5.2 km) south-southwest of Tomales, at an elevation of 7 feet (2 m). Hog Island is in the middle of Tomales Bay, to the west of Nick's Cove, and Point Reyes National Seashore constitutes the western landmass on the opposite side of the bay. The name honors Nick Kojich, who in 1931 opened a seafood restaurant at this location, which is still in operation.