Rivers in Montana
Blackfoot River near Bonner
Below flood stage
2.10ftStage
Observed Tue, Sep 29, 2:30 PM MDT
- Flood stage
- 10.00 ft
- Forecast crest
- 2.08 ftTue, Sep 29, 6:00 PM MDT
- Record crest
- 16.00 ft1996
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 17.00 ft |
| Moderate flood | 16.00 ft |
| Minor flood | 10.00 ft |
| Action | 9.50 ft |
- 10.00 ftFlooding to low lying areas adjacent to the river is possible.
Flood outlook
Chance of flooding, October to December
| Category | Chance |
|---|---|
| Minor flooding | Under 5% |
| Moderate flooding | Under 5% |
| Major flooding | Under 5% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 29, 2026.
Crest history
22 crests on NOAA’s list since 1953.
| # | Date | Stage |
|---|---|---|
| 1 | February 9, 1996 | 16.00 ft |
| 2 | June 4, 1953 | 11.65 ft |
| 3 | May 11, 2018 | 11.09 ft |
| 4 | June 10, 1964 | 10.89 ft |
| 5 | June 20, 1975 | 10.74 ft |
| 6 | May 18, 1997 | 10.50 ft |
| 7 | June 9, 2011 | 10.01 ft |
| 8 | June 2, 1972 | 9.98 ft |
| 9 | June 15, 1976 | 9.48 ft |
| 10 | May 14, 1971 | 8.78 ft |
| 11 | June 3, 1967 | 8.78 ft |
| 12 | June 17, 1974 | 8.77 ft |
| 13 | June 7, 1959 | 8.72 ft |
| 14 | May 22, 1956 | 8.69 ft |
| 15 | May 21, 2020 | 8.52 ft |
| 16 | June 9, 1996 | 8.42 ft |
| 17 | May 20, 1970 | 8.42 ft |
| 18 | June 5, 2021 | 7.54 ft |
| 19 | June 17, 1982 | 7.53 ft |
| 20 | May 22, 1981 | 7.53 ft |
| 21 | June 12, 2022 | 6.47 ft |
| 22 | May 12, 2025 | 5.17 ft |
Most recent crests
- May 12, 2025: 5.17 ft
- June 12, 2022: 6.47 ft
- June 5, 2021: 7.54 ft
- May 21, 2020: 8.52 ft
- May 11, 2018: 11.09 ft
- June 9, 2011: 10.01 ft
- May 18, 1997: 10.50 ft
- June 9, 1996: 8.42 ft
- February 9, 1996: 16.00 ft
- June 17, 1982: 7.53 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Northwest River Forecast Center. Forecasts are issued routinely year-round.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.