Belvedere Island (formerly, El Potrero de la Punta del Tiburon, Kashow's Island, Peninsula Island, Promontory Island, and Still Island) is a rocky island in Marin County, California which was separated by a marsh from the mainland and has now been linked by two spits. Part of the town of Belvedere, California is located on the island.
 Natural history
there are a variety of flora and fauna represented on Belvedere Island. Presence of herons has been noted for a considerable period of time. Some of the flora are common to nearby Ring Mountain, where a considerable floral biodiversity has been documented. Ring Mountain has also been established to have been a settlement area for early Native American inhabitants of this local area.
- Durham, David L. (1998). California's Geographic Names: A Gazetteer of Historic and Modern Names of the State. Quill Driver Books. p. 601. ISBN 9781884995149.
- U.S. Geological Survey. 2009. USGS Belvedere Island USGS San Francisco North Quad, California, Topographic Map
- Helen M. Pratt (1984). "Marin County California Heron Colonies". Western Birds 14 (4): 169–184.
- C. Michael Hogan (2008) Ring Mountain, The Megalithic Portal, ed. A. Burnham
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