About this river
Clark Fork is a 5.2 mile river near Action Water Sports 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.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 13,700 | 10,200 to 16,800 | |
| February | 12,900 | 9,620 to 16,200 | |
| March | 14,100 | 9,890 to 19,200 | |
| April | 24,900 | 15,950 to 31,450 | |
| May | 40,300 | 32,700 to 61,900 | |
| June | 49,300 | 34,800 to 66,100 | |
| July | 20,500 | 13,500 to 29,700 | |
| August | 9,630 | 7,240 to 13,200 | |
| September | 8,390 | 6,475 to 10,800 | |
| October | 9,340 | 6,930 to 12,300 | |
| November | 11,700 | 8,605 to 15,450 | |
| December | 13,900 | 11,100 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.
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Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Clark Fork's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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