Horse Island is a island located in Riverside County, California. It appears on the Big Maria Mountains SE USGS 7.5-minute topographic quadrangle. The nearest populated place is Poston, approximately 11.3 miles to the NE.
Riverside County · California
Horse Island is a island located in Riverside County, California. It appears on the Big Maria Mountains SE USGS 7.5-minute topographic quadrangle. The nearest populated place is Poston, approximately 11.3 miles to the NE.