Please answer the following question: The Encampment River is a 44.7-mile-long (71.9 km) tributary of the North Platte River. The river's source is east of Buck Mountain in the Park Range of Jackson County Colorado. The river flows north and passes to the east of the town of Encampment Wyoming then through the town of Riverside Wyoming before its confluence with the North Platte. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Natural Place