Please answer the following question: 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. Alsea River - The Alsea River flows 48.5 miles (78.1 km) from Alsea an unincorporated community in the coastal mountains of the U.S. state of Oregon to the Pacific Ocean near the city of Waldport. It begins at the confluence of the North Fork Alsea River and the South Fork Alsea River and ends in Alsea Bay a wide estuary at Waldport.
A:
Natural Place