About this river
Blackfoot River is an 18.0 mile river near LB Snow in Montana. Streamflow is measured at the USGS gauge Blackfoot River near Bonner MT (site 12340000). The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1898 to 2026
Blackfoot River typically runs highest in May, at a median 4,470 cfs, and lowest in January, at 523 cfs. The highest flow on record for any single day is 18,600 cfs, in 2018.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 523 | 430 to 624 | |
| February | 540 | 460 to 622 | |
| March | 648 | 510 to 829 | |
| April | 1,740 | 1,175 to 2,715 | |
| May | 4,470 | 3,060 to 6,590 | |
| June | 4,265 | 2,870 to 6,025 | |
| July | 1,470 | 1,000 to 2,060 | |
| August | 749 | 602 to 911 | |
| September | 640 | 523 to 739 | |
| October | 610 | 518 to 694 | |
| November | 608 | 532 to 716 | |
| December | 545 | 460 to 656 |
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 92 years of record. Statistics published by the US Geological Survey for Blackfoot River near Bonner MT (site 12340000). 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 Blackfoot 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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