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
U.S. Route 11 in New York south of Champlain, bypassing the village completely. In northeastern St. Lawrence County, US 11 originally served the neighboring hamlets of Brasher Falls and Winthrop. The route left its modern alignment in Stockholm (at Stockholm Center) and rejoined it in Lawrence (at Coteys Corner). On September 1, 1982, ownership and maintenance of CR 110, a county road extending from Stockholm Center to Coteys Corner on a direct east–west routing, was transferred from St. Lawrence County to the state of New York as part of a highway maintenance swap between the two levels of government and the village of Canton. The new