Grindstone Island is a island located in Jefferson County, New York. It appears on the Thousand Island Park USGS 7.5-minute topographic quadrangle. The nearest populated place is Upper Town Landing, approximately 1.0 miles to the SSE.
Jefferson County · New York
Grindstone Island is a island located in Jefferson County, New York. It appears on the Thousand Island Park USGS 7.5-minute topographic quadrangle. The nearest populated place is Upper Town Landing, approximately 1.0 miles to the SSE.