Kent Lake

San Geronimo Creek is a stream in Marin County, California, United States, which feeds into Lagunitas Creek below Kent Lake.

The Inkwells (also known as The Ink Wells) are two deep natural swimming pools in Lagunitas Creek, in Marin County, California. The upper Inkwell is also known as "Shafters", named after the former railroad bridge that bore its name nearby, whereas the lower Inkwell is simply known as "Inkwell" or "Hole" because it is deeper and darker. Together, they are known as "The Inkwells". They are a common swimming spot in summer, despite failing to meet current water quality standards due to high levels of coliform. The Inkwells are accessible by car as well as public transit, with a Marin Transit bus stop being less than a mile away. The Inkwells Bridge, which runs above the inkwells, is part of the Bay Area Ridge Trail. It also carries pipes that bring water from nearby Kent Lake and the nearby Nicasio Reservoir to be treated.

Lagunitas (Laguna, Spanish for "Little lagoons") is an unincorporated community in Marin County, California. It is located 10 miles (16 km) southwest of Novato, at an elevation of 217 feet (66 m). Lagunitas is aggregated with Forest Knolls by the U.S. Census into the census-designated place (CDP) Lagunitas-Forest Knolls. The first post office at Lagunitas opened in 1906. Lagunitas' ZIP Code is 94938.

Lagunitas-Forest Knolls is a census-designated place, composed of two unincorporated areas in the western half of the San Geronimo Valley in Marin County, California. It is located to the west of San Geronimo and Woodacre. The population was 1,924 at the 2020 census.The two towns are locally seen as separate. Geographically divided by narrow points in the San Geronimo Valley, each has its own small commercial center. Both towns are primarily residential. The ZIP code of Lagunitas is 94938, while the ZIP code of Forest Knolls is 94933.

Forest Knolls is an unincorporated community in Marin County, California. It is located 9 miles (14 km) southwest of Novato, at an elevation of 249 feet (76 m). For census purposes, Forest Knolls is aggregated with Lagunitas into the census-designated place Lagunitas-Forest Knolls. The first post office at Forest Knolls opened in 1916. Forest Knolls' ZIP Code is 94933.There are a number of small historical businesses in Forest Knolls such as the Papermill Creek Saloon.

San Geronimo Valley is located in Marin County, California, composed of four unincorporated towns: Woodacre, San Geronimo, Forest Knolls, and Lagunitas. It is a fairly close-knit community, with a rather liberal citizenry. The farther west one goes along the valley, the more forested the land becomes. The valley is bisected roughly east-to-west by Sir Francis Drake Boulevard; a number of streets in the towns along this road were constructed on the former right-of-way of the Northwestern Pacific Railroad. The valley has numerous hiking/biking trails. Most of the residents reside on the south, shadier, side of the valley. The San Geronimo Valley derives its name from the San Geronimo Ranch, established by Adolph Mailliard and Ann Eliza Ward in 1868, where they bred thoroughbred horses, including the famous stallion Monday, who sired most of the race horses in California. The Valley is part of the Lagunitas School District, unique in that it operates two alternative elementary programs and a traditional middle school program on two connected campuses with one superintendent, one principal, and one school board. Each elementary program (Open Classroom, Montessori-inspired) has its own unique philosophy and pedagogical methods, all working within the framework of the California professional and academic standards. Each program involves parent participation to some degree. The main businesses in the Valley are the Papermill Saloon in Forest Knolls, Arti Cafe, The Pump Espresso, Woodacre Market and Deli, and the Lagunitas Grocery, though there are numerous others. Woodacre is home to Spirit Rock Meditation Center, dedicated to the teachings of Buddha and Vipasannā mediation; Dickson Ranch, and the Marin County Fire Department headquarters. San Geronimo Valley also comprises the greater part of the Lagunitas Watershed, in which some of the last remaining coho salmon spawn. The San Geronimo Valley Community Center, attached to the school district, is a hub for community events and hosts the local food bank.

Barnabe Creek is a stream in the U.S. state of California. It is located in Marin County.

Samuel P. Taylor State Park is a state park located in Marin County, California, United States, which includes approximately 2,700 acres (11 km2) of redwood forest and grassland. The park contains about 600 acres (2.4 km2) of old-growth forest, some of which can be seen along the Pioneer Tree Trail.

The Olema Lime Kilns at Point Reyes National Seashore in California were built in 1850 on land leased from Mexican grantee Rafael Garcia by James A. Shorb and William F. Mercer, two San Francisco entrepreneurs. The kilns were reportedly fired only a few times, and have lain abandoned for some 140 years. They were apparently abandoned no later than 1855 after only a few firings, probably due to the poor quality, small limestone deposits and the financial depression of that year. They represent a Gold Rush era effort to establish a lime-producing industry in Marin County, only two years after cession of Alta California to the United States by Mexico. They consist of three long-abandoned, barrel-shaped stone vaults lying in ruins against a hillside on the east side of Olema Creek about five miles south of Olema and about 100 yards west of California State Highway 1.

San Geronimo (Spanish: San Gerónimo, meaning "St. Jerome") is a census-designated place (CDP) located in the San Geronimo Valley in Marin County, California in the United States. San Geronimo is bordered by Lagunitas-Forest Knolls to its west and Woodacre to its east. It is 8 miles (13 km) southwest of downtown Novato at an elevation of 292 feet (89 m). The population was 510 at the 2020 census.

The Olema Valley Dairy Ranches Historic District is one of six Point Reyes sites listed on the National Register of Historic Places in 2018. It is a 14,127 acres (57.17 km2) historic district which was listed on April 9, 2018. The district includes 19 of the working ranches in the area from Point Reyes Station to Bolinas and includes more than 14,000 acres. According to D.S. Livingston in 1995, "Despite its status as a National Recreation Area, virtually all of the Olema Valley retains its historic rural ranching character. The former dairy ranches, many with pioneer structures intact, continue to thrive under the stewardship of families who have been here for generations."

West Marin is the largest rural region of Marin County, California. The West Marin Chamber of Commerce includes seven unincorporated communities in its definition of West Marin: Point Reyes Station, Olema, Stinson Beach, Bolinas, Tomales, Dillon Beach, and Inverness. West Marin is generally considered to be west of Muir Beach and Nicasio on the Pacific Ocean side of Mount Tamalpais. The Point Reyes Light is a weekly newspaper covering West Marin, and the website of the Marin Independent Journal has a category for West Marin news. And KWMR is their public radio station. Unlike the rest of the county, which is served by Golden Gate Transit, West Marin is served only by Marin Transit, which connects to Golden Gate Transit lines at Marin City and in the San Geronimo Valley, among other locations. The Environmental Action Committee of West Marin, active since the 1970s, focuses on environmental issues such as preserving open space and protecting vulnerable species. The Straus Family Creamery is just north of Marshall.