Island No. 1 facts for kids

Quick facts for kids
Island No. 1

USGS aerial imagery of Island No. 1
Island No. 1 Location in San Francisco Bay Area Show map of San Francisco Bay Area Island No. 1 Location in California Show map of California Island No. 1 Location in the United States Show map of the United States
Geography
Location	Northern California
Coordinates	38°08′35″N 122°20′40″W / 38.14306°N 122.34444°W / 38.14306; -122.34444 (Island No. 1)
Adjacent bodies of water	Napa River
Highest elevation	3 ft (0.9 m)
Administration
United States
State	California
County	Napa and Solano

Island No. 1 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.

Island No. 1 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°08′35″N 122°20′40″W / 38.14306°N 122.34444°W / 38.14306; -122.34444 (Island No. 1), and the United States Geological Survey measured its elevation as 3 ft (0.91 m) in 1981.