What was Clyde River a part of that extends from Old Forge in the Adirondacks of New York to Fort Kent, Maine?
Clyde River (Vermont):  It is part of the Northern Forest Canoe Trail. Northern Forest Canoe Trail: The Northern Forest Canoe Trail (NFCT) is a 740 mi marked canoeing trail in the northeastern United States and Canada, extending from Old Forge in the Adirondacks of New York to Fort Kent, Maine.
The Northern Forest Canoe Trail