Beaver River is a hamlet that is six tenths of a mile square, at the east end of Stillwater Reservoir, in the town of Webb in Herkimer County, New York. The hamlet is surrounded by the Adirondack Park. The hamlet has a year-round population of eight, that increases during the summer as many people have camps in this wilderness area. There are 125 private properties, and three commercial businesses. No roads lead to the hamlet; it is accessible only by hiking, rail car or boat in the summer and by snowmobile, snowshoes or cross country skis in the winter. There is no electrical service. The town is named for the Beaver River.