About this river
North Fork Flathead River is an 11.4 mile river near Glacier Outfitters in Montana. Streamflow is measured at the USGS gauge N F Flathead River nr Columbia Falls MT (site 12355500). The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1940 to 2025
North Fork Flathead River typically runs highest in June, at a median 9,265 cfs, and lowest in February, at 640 cfs. The highest flow on record for any single day is 58,000 cfs, in 1964.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 660 | 515 to 875 | |
| February | 640 | 509 to 814 | |
| March | 724 | 561 to 1,070 | |
| April | 2,795 | 1,565 to 3,895 | |
| May | 9,090 | 6,570 to 13,100 | |
| June | 9,265 | 6,220 to 12,700 | |
| July | 3,300 | 2,370 to 5,050 | |
| August | 1,450 | 1,100 to 1,760 | |
| September | 969 | 817 to 1,200 | |
| October | 905 | 740 to 1,250 | |
| November | 929 | 724 to 1,400 | |
| December | 754 | 604 to 1,090 |
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 85 years of record. Statistics published by the US Geological Survey for N F Flathead River nr Columbia Falls MT (site 12355500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show North Fork Flathead River'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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