The Elk River is a 192 km (119 mile) long river, originating in the Rocky Mountains of eastern British Columbia, Canada. It flows through the Elk Valley in a southwesterly direction, joining the Kootenay River (here the Lake Koocanusa reservoir) just north of the British Columbia-Montana border. Elk River runs through the communities of Elkford, Sparwood, Hosmer, Fernie, and Elko.
The Elk River is a tributary of the Kanawha River, 172 mi (277 km) long, in central West Virginia in the United States. Via the Kanawha and Ohio Rivers, it is part of the watershed of the Mississippi River.