Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. East Branch Mattawamkeag River - The East Branch Mattawamkeag River is a tributary of the Mattawamkeag River in Aroostook County Maine. From its source (461351N 680853W) in Dudley (Maine Township 7 Range 3 WELS) the river runs 36 miles (58 km) south and southeast to its confluence with the West Branch Mattawamkeag River in Haynesville about 10 miles (16 km) west of the Canada United States border.
Answer:
Natural Place