Black Mountain (Washington County, New York) Black Mountain (Washington County, New York) Black Mountain is a mountain located in Washington County, New York, of which its peak is the highest point. Isolated from the rest of the Adirondack Mountains by Lake George, Black Mtn. has the seventh highest topographic prominence of all the mountains in New York. Black Mountain stands within the watershed of Lake Champlain, thence into Canada's Richelieu River, the Saint Lawrence River, and into the Gulf of Saint Lawrence. The northwest and south sides of Black Mtn. drain into Lake George, thence into La Chute River, and Lake Champlain. The northeast side of
Tupper Lake (town), New York water body in the southwest part of the town, and crosses the county line into St. Lawrence County. New York State Route 3 joins New York State Route 30 at Tupper Lake village; the highways are conjoined through the eastern part of the town. The Raquette River, a northwest flowing tributary of the St. Lawrence River, flows past Tupper Lake village. As of the census of 2000, there were 6,137 people, 2,429 households, and 1,530 families residing in the town. The population density was 52.2 people per square mile (20.1/km²). There were 3,118 housing units at an average density of