Duncan River (British Columbia)

Duncan River
Location
CountryCanada
ProvinceBritish Columbia
DistrictKootenay Land District
Physical characteristics
SourceNear Mount Dawson
  locationPurcell Trench
MouthKootenay River
  location
Kootenay Lake
  coordinates
50°10′43″N 116°56′08″W / 50.17861°N 116.93556°W / 50.17861; -116.93556
Length206 km (128 mi)
Basin size2,443 km2 (943 sq mi)
Discharge 
  locationBelow Lardeau River
  average162 m3/s (5,700 cu ft/s)
  minimum12.8 m3/s (450 cu ft/s)
  maximum807 m3/s (28,500 cu ft/s)

The Duncan River is in the West Kootenay region of southeastern British Columbia. Entering the North Arm of Kootenay Lake, the river is a major tributary of the Kootenay River, which in turn flows into the Columbia River. The Selkirk Mountains lie to the west and the Purcell Mountains to the east.