Columbia River

The Columbia River is the largest river in the Pacific Northwest region of North America. The river forms in the Rocky Mountains of British Columbia, Canada. It flows northwest... Wikipedia

  • Country:  Canada, United States
  • Province:  British Columbia
  • State:  Washington, Oregon
  • Cities:  Revelstoke, BC, Castlegar, BC, Trail, BC, Wenatchee, WA, East Wenatchee, WA, Tri-Cities, WA, The Dalles, OR, Hood River, OR, Portland, OR, Vancouver, WA, Longview, WA, Astoria, OR
  • Main source:  British Columbia, Canada, 2,690 ft (819.91 m)
  • River mouth:  0 ft (0 m)
  • Progression:  Pacific Ocean
  • River system:  Columbia River
  • Basin size:  258,000 sq mi (668,216.93 km²)
  • Length:  1,243 mi (2,000.41 km)
  • Discharge:  Location, Astoria (near mouth), Average rate, (Period: 1951–1980)265,000 cu ft/s (7,503.96 m³/s) (Period: 1969–2023)234,700 cu ft/s (6,645.96 m³/s)
  • Discharge, (location 2):  Location, Port Westward, Minimum rate, 63,600 cu ft/s (1,800.95 m³/s)(Year: 2001), Average rate, (Period: 1969–2023)233,700 cu ft/s (6,617.65 m³/s), Maximum rate, 864,000 cu ft/s (24,465.76 m³/s)(Year: 1996)
  • Discharge, (location 3):  Location, The Dalles, Minimum rate, 12,100 cu ft/s (342.63 m³/s)(Year: 1968), Average rate, (Period: 1879–2023)188,500 cu ft/s (5,337.73 m³/s), Maximum rate, 1,240,000 cu ft/s (35,112.89 m³/s)(Year: 1894)
  • Discharge, (location 4):  Location, Priest Rapids Dam, Minimum rate, 36,400 cu ft/s (1,030.73 m³/s)(Year: 1962), Average rate, (1960–2023)118,200 cu ft/s (3,347.05 m³/s), Maximum rate, 533,000 cu ft/s (15,092.88 m³/s)(Year: 1961)
  • Discharge, (location 5):  Location, United States and Canada international boundary, Minimum rate, 21,200 cu ft/s (600.32 m³/s)(Year: 1944), Average rate, (Period: 1938– 2023)99,300 cu ft/s (2,811.86 m³/s), Maximum rate, 550,000 cu ft/s (15,574.27 m³/s)(Year: 1948)
  • Tributaries:  Left, Spillimacheen River, Beaver River, Illecillewaet River, Incomappleux River, Kootenay River, Pend Oreille River, Spokane River, Crab Creek, Snake River, John Day River, Deschutes River, Willamette River, Right, Kicking Horse River, Blaeberry River, Canoe River, Kettle River, Sanpoil River, Okanogan River, Entiat River, Wenatchee River, Yakima River, Lewis River, Cowlitz River
  • Data source:  DuckDuckGo