The West Branch Mattawamkeag River is a 52.6 miles (84.7 km) tributary of the Mattawamkeag River

Mattawamkeag River

The Mattawamkeag River is a river in Maine. From the confluence of its East Branch and West Branch in Haynesville, about west of the Canada – United States border, the river runs south and west to its mouth on the Penobscot River in Mattawamkeag....

 in Maine

Maine

Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...

. From its source (46.1354°N 68.5025 °W) in Maine Township 6, Range 6, WELS, the river runs 10 miles (16.1 km) northeast by Pleasant Lake and through Mud Lake and Rockabema Lake, then 42 miles (67.6 km) south and southeast through Upper Mattawamkeag Lake and Mattawamkeag Lake to its confluence

Confluence

Confluence, in geography, describes the meeting of two or more bodies of water.Confluence may also refer to:* Confluence , a property of term rewriting systems...

 with the East Branch Mattawamkeag River

East Branch Mattawamkeag River

The East Branch Mattawamkeag River is a tributary of the Mattawamkeag River in Aroostook County, Maine. From its source in Dudley , the river runs south and southeast to its confluence with the West Branch Mattawamkeag River in Haynesville, about west of the Canada – United States...

 in Haynesville

Haynesville, Maine

Haynesville is a town in Aroostook County, Maine, United States. The population was 122 at the 2000 census.-Geography:According to the United States Census Bureau, the town has a total area of , of which, of it is land and of it is water....

, about 10 miles (16.1 km) west of the Canada – United States border.