The Swift River (Deg Xinag: Xelinhdi; Dena'ina: Huch'altnu) is a tributary, about 100 mi long, of the Kuskokwim River in the U.S. state of Alaska. Formed by meltwater from several glaciers in the Revelation Mountains of the Alaska Range, the river flows generally west and northwest to meet the larger stream 13 mi northeast of Sleetmute. The Swift is 13 mi upriver from the village of Stony River, not Sleetmute.