Pliocene Ridge is a ridge located in Sierra County, California. It appears on the Downieville USGS 7.5-minute topographic quadrangle. The nearest populated place is Mount Vernon (historical), approximately 1.5 miles to the N.
Sierra County · California
Pliocene Ridge is a ridge located in Sierra County, California. It appears on the Downieville USGS 7.5-minute topographic quadrangle. The nearest populated place is Mount Vernon (historical), approximately 1.5 miles to the N.