Green Island (California)

Green Island
Aerial image of an island.
USGS aerial imagery of Green Island
Green Island is located in San Francisco Bay Area
Green Island
Green Island
Green Island is located in California
Green Island
Green Island
Green Island is located in the United States
Green Island
Green Island
Geography
LocationNorthern California
Coordinates38°12′09″N 122°18′16″W / 38.20250°N 122.30444°W / 38.20250; -122.30444 (Green Island)[1]
Adjacent toNapa River
Highest elevation23 ft (7 m)[1]
Administration
United States
State California
CountyNapa
Green Island as it appears on a 1951 USGS topographic map.
An aerial view, looking toward the west, of the Napa River where it flows into San Pablo Bay through Vallejo. Islands visible include, from bottom of image: Mare, No. 1, Knight, Russ, No. 2, Green, Bull, Edgerly, Coon, Little, and Tubbs.

Green Island is an island in the Napa River, upstream of San Pablo Bay (an embayment of San Francisco Bay).[2][3][4][5][6][7][8][9][10][11][12][13][14] It is in Napa County, California, and managed as part of the Napa-Sonoma Marshes Wildlife Area.[15][16] Its coordinates are 38°12′09″N 122°18′16″W / 38.20250°N 122.30444°W / 38.20250; -122.30444 (Green Island)[1], and the United States Geological Survey measured its elevation as 23 ft (7.0 m) in 1981.[1] It, long with Island No. 1, Island No. 2 and Tubbs Island, are labeled on a 1902 USGS map of the area.[17]

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