Island No. 1
From Wikipedia, the free encyclopedia
 Island No. 1, submerged in March 2023 (as seen from the northern part of an internal levee, looking south). | |
  Island No. 1  Island No. 1  Island No. 1 | |
| Geography | |
|---|---|
| Location | Northern California |
| Coordinates | 38°08′35″N 122°20′40″W / 38.14306°N 122.34444°W[1] |
| Adjacent to | Napa River |
| Highest elevation | 3 ft (0.9 m)[1] |
| Administration | |
United States | |
| State |  California |
| County | Napa and Solano |
Island No. 1 (formerly called Cross Island)[2] is a partially submerged island in the Napa River, upstream of San Pablo Bay (an embayment of San Francisco Bay).[3][4][2] It is in Napa and Solano County, California, and parts of it are managed as part of the Napa-Sonoma Marshes Wildlife Area.[5][6] Its coordinates are 38°08′35″N 122°20′40″W / 38.14306°N 122.34444°W[1], and the United States Geological Survey measured its elevation as 3 ft (0.91 m) in 1981.[1] It, along with Island No. 2, Green Island and Tubbs Island, are labeled on a 1902 USGS map of the area.[7]
