Mattawamkeag River

Mattawamkeag River
Country	United States
Physical characteristics
Main source	Maine 365 feet (111 m)
River mouth	Penobscot River 190 feet (58 m) 45°31′08″N 68°21′40″W / 45.519°N 68.361°W / 45.519; -68.361Coordinates: 45°31′08″N 68°21′40″W / 45.519°N 68.361°W / 45.519; -68.361
Length	51 miles (82 km)
Basin features
Tributaries	Left: East Branch Mattawamkeag River Right: West Branch Mattawamkeag River, Molunkus Stream

The Mattawamkeag River is a river in Maine. From the confluence of its East Branch and West Branch (45°50′00″N 67°59′27″W / 45.8334°N 67.9907°W / 45.8334; -67.9907 (Mattawamkeag River source)) in Haynesville, about 10 miles (16 km) west of the Canada–United States border, the river runs 50.6 miles (81.4 km) south and west to its mouth on the Penobscot River in Mattawamkeag.

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