The Northwest Branch Saint John River (French: Décharge du Lac Frontière) is a 15.5-mile-long (24.9 km) river primarily in Aroostook County, Maine, USA. Its origin (46°42′04″N 69°59′55″W) is Frontier Lake (Quebec-Maine) in Quebec, Canada. After crossing the Canada–United States border, the Northwest Branch runs south close to the border until it picks up its tributary, the Daaquam River, which also flows out of Canada.
The Northwest Branch then runs generally eastward to its confluence with the Southwest Branch to form the Saint John River.
Has current flowing in:
Montmagny Regional Count...
Click any point for details. Sections without stored geometry are drawn as straight put-in → take-out lines — actual courses follow the river.