Threemile Harbor is a bay located in Suffolk County, New York. It appears on the Gardiners Island West USGS 7.5-minute topographic quadrangle. The nearest populated place is Threemile Harbor, approximately 0.6 miles to the ESE.
Suffolk County · New York
Threemile Harbor is a bay located in Suffolk County, New York. It appears on the Gardiners Island West USGS 7.5-minute topographic quadrangle. The nearest populated place is Threemile Harbor, approximately 0.6 miles to the ESE.