Island No. 1 | |
Pushpin Map: | United States San Francisco Bay Area#USA California#USA |
Coordinates: | 38.1431°N -122.3444°W |
Location: | Northern California |
Waterbody: | Napa River |
Area Sqft: | or |
Area Acre: | --> |
Length Ft: | --> |
Width Ft: | --> |
Coastline Ft: | --> |
Elevation Ft: | 3 |
Country: | United States |
Country Admin Divisions Title: | State |
Country Admin Divisions Title 1: | County |
Country Admin Divisions 1: | Napa and Solano |
Island No. 1 (formerly called Cross Island) is a partially submerged island in the Napa River, upstream of San Pablo Bay (an embayment of San Francisco Bay). It is in Napa and Solano County, California, and parts of it are managed as part of the Napa-Sonoma Marshes Wildlife Area. Its coordinates are 38.1431°N -122.3444°W, and the United States Geological Survey measured its elevation as in 1981. It, along with Island No. 2, Green Island and Tubbs Island, are labeled on a 1902 USGS map of the area.