[3] Some of the flora are common to nearby Ring Mountain (on the Tiburon Peninsula), where a considerable floral biodiversity has been documented.

In 1834, the first Mexican land grant in Marin gave the island to John Reed.

[citation needed] Israel Kashow, an American from Ohio who came to California as a Forty-Niner, was one of the first people to establish a permanent habitation on the island.

[1] He was later evicted from the island by a court order filed by heirs to John Reed's estate.

Belvedere is currently primarily residences and is home to the eighth highest-income community in the United States.