About this river
Clark Fork is a 7.9 mile river near LB Snow in Montana. Streamflow is measured at the USGS gauge Clark Fork at Turah Bridge nr Bonner MT (site 12334550). The National Hydrography Dataset places it at stream order 8. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1986 to 2026
Clark Fork typically runs highest in June, at a median 2,800 cfs, and lowest in August, at 557 cfs. The highest flow on record for any single day is 12,700 cfs, in 2011.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 726 | 596 to 864 | |
| February | 750 | 622 to 879 | |
| March | 960 | 800 to 1,290 | |
| April | 1,375 | 1,020 to 1,880 | |
| May | 2,580 | 1,940 to 3,350 | |
| June | 2,800 | 1,755 to 4,210 | |
| July | 1,040 | 786 to 1,530 | |
| August | 557 | 434 to 797 | |
| September | 625 | 477 to 872 | |
| October | 852 | 744 to 1,040 | |
| November | 849 | 744 to 1,020 | |
| December | 759 | 634 to 897 |
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 40 years of record. Statistics published by the US Geological Survey for Clark Fork at Turah Bridge nr Bonner MT (site 12334550). 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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