Seal Islands is a island located in Contra Costa County, California. It appears on the Vine Hill USGS 7.5-minute topographic quadrangle. The nearest populated place is Port Chicago (historical), approximately 1.6 miles to the ESE.
Contra Costa County · California
Seal Islands is a island located in Contra Costa County, California. It appears on the Vine Hill USGS 7.5-minute topographic quadrangle. The nearest populated place is Port Chicago (historical), approximately 1.6 miles to the ESE.