Grenell 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 Grenell, approximately 0.0 miles to the N.
Jefferson County · New York
Grenell 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 Grenell, approximately 0.0 miles to the N.