San Francisco Bay from the air in May 2010 04

The Tiburon Peninsula is a

landform A landform is a land feature on the solid surface of the Earth or other planetary body. They may be natural or may be anthropogenic (caused or influenced by human activity). Landforms together make up a given terrain, and their arrangement ...

of the

San Francisco Bay Area The San Francisco Bay Area, commonly known as the Bay Area, is a List of regions of California, region of California surrounding and including San Francisco Bay, and anchored by the cities of Oakland, San Francisco, and San Jose, California, S ...

Marin County Marin County ( ) is a county located in the northwestern part of the San Francisco Bay Area of the U.S. state of California. As of the 2020 census, the population was 262,231. Its county seat and largest city is San Rafael. Marin County is ac ...

and is home to the incorporated municipalities of Tiburon, Belvedere, and a portion of Corte Madera, California. Much of the peninsula is unincorporated, including portions of the north side and the communities of Paradise Cay and

Strawberry The garden strawberry (or simply strawberry; ''Fragaria × ananassa'') is a widely grown Hybrid (biology), hybrid plant cultivated worldwide for its fruit. The genus ''Fragaria'', the strawberries, is in the rose family, Rosaceae. The fruit ...

Richardson Bay Richardson Bay (originally Richardson's Bay) is a shallow, ecology, ecologically rich arm of San Francisco Bay, managed under by the Richardson Bay Regional Agency, created under a joint powers agreement by the County of Marin, Town of Tiburon, C ...

separates the peninsula from the Marin County mainland. Angel Island lies app. 1 mile south of the peninsula's southern tip. Much of the land area of the Tiburon Peninsula was part of a Spanish land grant originally given to the early Californian John Reed. A prominent feature of the Tiburon Peninsula is

Ring Mountain, Marin County Ring Mountain is an elevated landform on the Tiburon Peninsula (California), Tiburon Peninsula in Marin County, California, Marin County, California. This mountain was named for George E. Ring, who served as a Marin County Supervisor from 1895 to ...

, which forms the backbone of the peninsula and is the highest elevation of the peninsula. The Tiburon Peninsula is the location of a number of rare and

endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching, inv ...

flora species, and is also the site of ancient Native American rock carvings. The mineral

lawsonite Lawsonite is a hydrous calcium aluminium sorosilicate mineral with formula CaAl2Si2O7(OH)2·H2O. Lawsonite crystallizes in the orthorhombic system in prismatic, often tabular crystals. Crystal twinning is common. It forms transparent to transluce ...

was first described from an occurrence on the Tiburon Peninsula.F Leslie Ransome (1895) ''On Lawsonite, a New Rock-forming Mineral from the Tiburon Peninsula, Marin County, California'', University of California Press Tiburon Peninsula as seen from Ring Mountain

Tiburon Peninsula as seen from Ring Mountain

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Landforms of Marin County, California Landforms of the San Francisco Bay Area Peninsulas of California Tiburon, California {{MarinCountyCA-geo-stub