Big Basin is a basin located in Sonoma County, California. It appears on the Mount Saint Helena USGS 7.5-minute topographic quadrangle. The nearest populated place is Castle Rock Springs, approximately 4.0 miles to the N.
Sonoma County · California
Big Basin is a basin located in Sonoma County, California. It appears on the Mount Saint Helena USGS 7.5-minute topographic quadrangle. The nearest populated place is Castle Rock Springs, approximately 4.0 miles to the N.