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Okanogan River in Washington

River41.4 mi
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Around here

Around Okanogan River

Lost Lake Campground9.8 miConconully Lake/Conconully Reservoir13.2 mi5 mi

Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US

About this river

Okanogan River is a 41.4 mile river. Streamflow is measured at the USGS gauge Okanogan River at Malott, WA (site 12447200). The National Hydrography Dataset places it at stream order 8. Reach geometry comes from the USGS National Hydrography Dataset.

Typical flow by month

1966 to 2026

Okanogan River typically runs highest in June, at a median 8,175 cfs, and lowest in September, at 963 cfs. The highest flow on record for any single day is 45,300 cfs, in 1972.

Show the numbers
Typical flow by month at Okanogan River at Malott, WA, in cfs
MonthTypical (cfs)Usual range (cfs)
January1,160870 to 1,530
February1,300945 to 1,740
March1,520999 to 2,320
April2,6301,605 to 3,555
May7,6405,800 to 12,500
June8,1754,875 to 12,400
July3,0201,590 to 5,070
August995665 to 1,990
September963658 to 1,270
October1,050841 to 1,340
November1,3351,015 to 1,735
December1,180907 to 1,540

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 61 years of record. Statistics published by the US Geological Survey for Okanogan River at Malott, WA (site 12447200). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.

Boat access nearby

8 mapped launches sit in the mapped area of Okanogan River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.

  • Little Green LakeLittle Green LakePublic
  • Green LakeGreen LakePublic
  • RiversideOkanogan RiverPublic
  • Conconully State ParkConconully LakePublic
  • Fish Lake 1Fish LakesPublic
  • SouthsideFish LakesPublic
  • Fish Lake 4Fish LakesPublic
  • Aeneas LakeAeneas LakePublic

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