About this river
Middle Fork Flathead River is a 23.1 mile river near Wild River Adventures in Montana. Streamflow is measured at the USGS gauge M F Flathead River near West Glacier MT (site 12358500). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1940 to 2025
Middle Fork Flathead River typically runs highest in June, at a median 9,225 cfs, and lowest in February, at 549 cfs. The highest flow on record for any single day is 92,700 cfs, in 1964.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 582 | 442 to 815 | |
| February | 549 | 425 to 804 | |
| March | 678 | 483 to 1,020 | |
| April | 2,520 | 1,685 to 3,980 | |
| May | 8,950 | 6,450 to 13,000 | |
| June | 9,225 | 6,350 to 12,800 | |
| July | 3,190 | 2,220 to 4,850 | |
| August | 1,150 | 929 to 1,490 | |
| September | 753 | 617 to 996 | |
| October | 735 | 515 to 1,130 | |
| November | 850 | 565 to 1,415 | |
| December | 704 | 498 to 1,100 |
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 86 years of record. Statistics published by the US Geological Survey for M F Flathead River near West Glacier MT (site 12358500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
One mapped launch sits in the mapped area of Middle Fork Flathead River. Ramp data comes from the USGS national boat-ramp inventory.
- Riverside Boating SiteHungry Horse ReservoirPublic
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