Rivers in Montana
Marias River near Shelby
Below flood stage
2.81ftStage
Observed Mon, Sep 28, 9:30 PM MDT
- Flood stage
- 9.00 ft
- Record crest
- 23.64 ft1964
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 15.00 ft |
| Moderate flood | 13.00 ft |
| Minor flood | 9.00 ft |
| Action | 8.00 ft |
- 14.50 ftWater encroaches onto Interstate 15. Traffic is blocked. Some ranchers and other residents need to prepare for evacuation.
- 11.50 ftA fairway on golf course floods. Williamson Park almost completely innundated.
- 9.00 ftWater floods east and northeast portions of Williamson Park. Low spots on golf course flood.
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 23, 2026.
Crest history
89 crests on NOAA’s list since 1923.
| # | Date | Stage |
|---|---|---|
| 1 | June 9, 1964 | 23.64 ft |
| 2 | June 20, 1975 | 18.21 ft |
| 3 | June 18, 1948 | 17.75 ft |
| 4 | March 12, 1996 | 16.05 ft |
| 5 | January 27, 2011 | 13.96 ft |
| 6 | June 5, 1953 | 12.77 ft |
| 7 | February 25, 1986 | 12.58 ft |
| 8 | February 24, 1998 | 12.58 ft |
| 9 | June 11, 2002 | 12.30 ft |
| 10 | June 10, 2011 | 12.11 ft |
| 11 | March 10, 2014 | 11.72 ft |
| 12 | June 8, 1995 | 11.57 ft |
| 13 | March 13, 1972 | 11.57 ft |
| 14 | June 5, 1995 | 11.57 ft |
| 15 | March 18, 1969 | 11.12 ft |
| 16 | May 26, 2008 | 11.03 ft |
| 17 | February 6, 1962 | 10.74 ft |
| 18 | June 19, 2014 | 10.61 ft |
| 19 | February 28, 1957 | 10.58 ft |
| 20 | June 21, 2018 | 9.96 ft |
| 21 | June 25, 1951 | 9.72 ft |
| 22 | June 22, 1991 | 9.25 ft |
| 23 | March 20, 1997 | 9.14 ft |
| 24 | June 14, 1950 | 9.11 ft |
| 25 | March 27, 1952 | 8.98 ft |
Most recent crests
- June 21, 2022: 8.37 ft
- June 21, 2018: 9.96 ft
- May 12, 2018: 8.32 ft
- March 17, 2015: 6.21 ft
- June 19, 2014: 10.61 ft
- March 10, 2014: 11.72 ft
- May 14, 2013: 7.69 ft
- April 27, 2012: 7.19 ft
- June 10, 2011: 12.11 ft
- January 27, 2011: 13.96 ft
Nearby
Upstream, downstream and the gauges around this one.
- UpstreamBirch Creek (MT) at Swift Dam near Dupuyer
- DownstreamMarias River at Tiber Reservoir / Lake Elwell
- Birch Creek (MT) at Lake Francis Reservoir
- Cut Bank Creek at Cut Bank
- Teton River at Dutton
- Marias River at Chester
- Badger Creek at Four Horns Canal near Browning
- Teton River at Teton River abv Springhill near Choteau
- Teton River at Teton River abv Hwy 221 bridge
What this means
Forecasts by the Missouri Basin River Forecast Center. Forecasts are issued routinely during the warm season, and as needed at other times of the year. Stage may be affected by ice during winter months.
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.