Long Valley is a valley located in Contra Costa County, California. It appears on the Antioch South USGS 7.5-minute topographic quadrangle. The nearest populated place is West Hartley, approximately 2.1 miles to the N.
Contra Costa County · California
Long Valley is a valley located in Contra Costa County, California. It appears on the Antioch South USGS 7.5-minute topographic quadrangle. The nearest populated place is West Hartley, approximately 2.1 miles to the N.