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
Avalanche Lake (New York) miles to the east. Avalanche Lake feeds Lake Colden to the south, in the Hudson River watershed. To the north, the trail to the lake from the Adirondak Loj surmounts Avalanche Pass, which is only slightly above lake level but separates it from the Lake Champlain (St. Lawrence River) watershed. Following the lake toward Lake Colden, the trail is choked with large boulders, and a number of wooden ladders have been built to make passage possible. There are also three places where the trail takes to wooden catwalks, first built in the 1920s, that are bolted directly into the cliff