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Columbia River in Washington

River47.7 mi
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Around here

Around Columbia River

Octopus Creek4.9 miBowman Point20 mi20 mi

Source: Recreation Sites and Trails BC, Open Government Licence (British Columbia) · Source: Canadian Geographical Names Database (NRCan), Open Government Licence - Canada · Public land: USGS PAD-US

About this river

Columbia River is a 47.7 mile river. Streamflow is measured at the USGS gauge Columbia River at International Boundary (site 12399500). The National Hydrography Dataset places it at stream order 9. Reach geometry comes from the USGS National Hydrography Dataset.

Typical flow by month

1938 to 2026

Columbia River typically runs highest in June, at a median 183,000 cfs, and lowest in March, at 57,500 cfs. The highest flow on record for any single day is 549,000 cfs, in 1948.

Show the numbers
Typical flow by month at Columbia River at International Boundary, in cfs
MonthTypical (cfs)Usual range (cfs)
January74,40042,400 to 102,000
February64,10043,000 to 90,800
March57,50045,100 to 76,200
April67,80055,750 to 88,800
May130,000105,000 to 167,000
June183,000135,500 to 266,500
July141,000111,000 to 195,000
August102,00087,700 to 117,000
September73,05064,650 to 82,350
October67,50058,200 to 78,900
November70,15055,450 to 82,600
December82,70046,700 to 97,400

Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 88 years of record. Statistics published by the US Geological Survey for Columbia River at International Boundary (site 12399500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.

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