Armstrong Mountain (Keene Valley, New York) Armstrong Mountain (Keene Valley, New York) Armstrong Mountain is a mountain located in Essex County, New York, named after Thomas Armstrong, a local pioneer. The mountain is part of the Great Range of the Adirondack Mountains. Armstrong Mtn. is flanked to the southwest by Gothics, and to the northeast by Upper Wolfjaw Mountain. Armstrong Mountain stands within the watershed of the East Branch of the Ausable River, which drains into Lake Champlain, thence into Canada's Richelieu River, the Saint Lawrence River, and into the Gulf of Saint Lawrence. The east side of Armstrong Mtn. drains into the East Branch 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