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Hope Marina

Clark Fork in Montana

River62.1 mi
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Around here

Around Clark Fork

Big Eddy Campground8.2 miBad Medicine Campground11.4 mi20 mi

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

About this river

Clark Fork is a 62.1 mile river near Hope Marina in Idaho. Streamflow is measured at the USGS gauge Clark Fork River below Cabinet Gorge Dam ID (site 12391950). The National Hydrography Dataset places it at stream order 8. Reach geometry comes from the USGS National Hydrography Dataset.

Typical flow by month

1996 to 2026

Clark Fork typically runs highest in June, at a median 49,300 cfs, and lowest in September, at 8,390 cfs. The highest flow on record for any single day is 130,000 cfs, in 1997.

Show the numbers
Typical flow by month at Clark Fork River below Cabinet Gorge Dam ID, in cfs
MonthTypical (cfs)Usual range (cfs)
January13,70010,200 to 16,800
February12,9009,620 to 16,200
March14,1009,890 to 19,200
April24,90015,950 to 31,450
May40,30032,700 to 61,900
June49,30034,800 to 66,100
July20,50013,500 to 29,700
August9,6307,240 to 13,200
September8,3906,475 to 10,800
October9,3406,930 to 12,300
November11,7008,605 to 15,450
December13,90011,100 to 17,200

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 30 years of record. Statistics published by the US Geological Survey for Clark Fork River below Cabinet Gorge Dam ID (site 12391950). 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 Clark Fork, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.

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