About this river
Clark Fork is a 6.9 mile river near 10,000 Waves Raft & Kayak Adventures in Montana. Streamflow is measured at the USGS gauge Clark Fork below Missoula MT (site 12353000). The National Hydrography Dataset places it at stream order 8. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1930 to 2025
Clark Fork typically runs highest in June, at a median 15,400 cfs, and lowest in August, at 2,030 cfs. The highest flow on record for any single day is 54,100 cfs, in 1997.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 2,060 | 1,710 to 2,580 | |
| February | 2,240 | 1,860 to 2,720 | |
| March | 2,670 | 2,250 to 3,440 | |
| April | 5,310 | 3,725 to 8,260 | |
| May | 12,100 | 9,830 to 19,000 | |
| June | 15,400 | 10,400 to 21,250 | |
| July | 4,530 | 2,820 to 6,650 | |
| August | 2,030 | 1,500 to 2,650 | |
| September | 2,115 | 1,650 to 2,690 | |
| October | 2,520 | 2,080 to 2,990 | |
| November | 2,580 | 2,235 to 3,095 | |
| December | 2,250 | 1,880 to 2,770 |
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 96 years of record. Statistics published by the US Geological Survey for Clark Fork below Missoula MT (site 12353000). 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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