Southwest Branch Saint John River

Southwest Branch Saint John River
Countries	Canada, United States
States	Quebec, Maine
Physical characteristics
Main source	Little Saint John Lake (French: Petit lac Saint-Jean), Maine–Quebec border 489 metres (1,604 ft) 46°06′19″N 70°15′09″W / 46.10528°N 70.25250°W / 46.10528; -70.25250
River mouth	Saint John River 333 metres (1,093 ft) 46°33′46″N 69°53′06″W / 46.56278°N 69.88500°W / 46.56278; -69.88500Coordinates: 46°33′46″N 69°53′06″W / 46.56278°N 69.88500°W / 46.56278; -69.88500
Length	91.9 kilometres (57.1 mi)
Basin features
Tributaries	Left: (from the mouth) In Maine: Carter Brook; in Quebec: Doucet Brook, Morning North Brook, Morning South Brook, discharge of Lac Croche, discharge of 3 unnamed little lakes, discharge of Giguère lake, discharge of Joli lake. Right: (from the mouth) In Maine: Knowles Brook, Doucie Brook, Little Southwest Branch, Dead brook.

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The Southwest Branch Saint John River (French: Rivière Saint-Jean Sud-Ouest) is a 62.0-mile-long (99.8 km) river in Maine and Quebec. The branch originates in "Little Saint John Lake" (46°06′18″N 70°15′09″W / 46.1050°N 70.2524°W / 46.1050; -70.2524 (Southwest Branch Saint John River source)) on the international boundary between Saint-Zacharie, Quebec and Seboomook Lake Township 5, Range 20, WELS. The branch forms the Canada–United States border as it flows northeasterly to a confluence with the Little Southwest Branch Saint John River in Seboomook Lake Township 9, Range 18, WELS. The Southwest Branch flows briefly into Quebec (46°24′58″N 70°03′24″W / 46.4162°N 70.0567°W / 46.4162; -70.0567 (Canada – United States border)) and then through Maine to its confluence with the Baker Branch Saint John River in Seboomook Lake Township 9, Range 17, WELS. The Southwest Branch finally joins with the Northwest Branch to form the Saint John River.

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