Markley Canyon 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 Los Medanos, approximately 1.6 miles to the N.
Contra Costa County · California
Markley Canyon 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 Los Medanos, approximately 1.6 miles to the N.