Washington Rock is a pillar located in Somerset County, New Jersey. It appears on the Plainfield USGS 7.5-minute topographic quadrangle. The nearest populated place is Warrenville, approximately 1.3 miles to the W.
Somerset County · New Jersey
Washington Rock is a pillar located in Somerset County, New Jersey. It appears on the Plainfield USGS 7.5-minute topographic quadrangle. The nearest populated place is Warrenville, approximately 1.3 miles to the W.