Rivers in Montana
Saint Mary River at International boundary
Below flood stage
3.98ftStage
Observed Tue, Sep 29, 10:10 PM MDT
- Flood stage
- 7.50 ft
- Record crest
- 13.46 ft1975
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 9.50 ft |
| Moderate flood | 8.50 ft |
| Minor flood | 7.50 ft |
| Action | 6.50 ft |
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
54 crests on NOAA’s list since 1908.
| # | Date | Stage |
|---|---|---|
| 1 | June 21, 1975 | 13.46 ft |
| 2 | June 5, 1908 | 12.75 ft |
| 3 | May 28, 2019 | 12.02 ft |
| 4 | June 7, 1995 | 10.99 ft |
| 5 | March 13, 2003 | 9.96 ft |
| 6 | June 19, 2014 | 9.00 ft |
| 7 | June 13, 1970 | 8.75 ft |
| 8 | May 30, 1967 | 8.75 ft |
| 9 | June 4, 1966 | 8.60 ft |
| 10 | June 20, 1965 | 8.59 ft |
| 11 | June 19, 1974 | 8.59 ft |
| 12 | May 31, 1971 | 8.44 ft |
| 13 | July 1, 2002 | 8.30 ft |
| 14 | June 2, 1997 | 8.29 ft |
| 15 | June 21, 1991 | 8.22 ft |
| 16 | June 12, 1972 | 8.06 ft |
| 17 | June 11, 1989 | 7.92 ft |
| 18 | June 27, 1969 | 7.87 ft |
| 19 | June 9, 2011 | 7.80 ft |
| 20 | June 10, 1996 | 7.79 ft |
| 21 | June 17, 2010 | 7.77 ft |
| 22 | November 9, 2006 | 7.75 ft |
| 23 | May 20, 1993 | 7.74 ft |
| 24 | June 1, 1986 | 7.64 ft |
| 25 | May 26, 2008 | 7.58 ft |
Most recent crests
- June 14, 2022: 7.54 ft
- May 28, 2019: 12.02 ft
- June 19, 2014: 9.00 ft
- May 15, 2013: 6.82 ft
- June 27, 2012: 7.12 ft
- June 9, 2011: 7.80 ft
- June 17, 2010: 7.77 ft
- June 1, 2009: 6.26 ft
- May 26, 2008: 7.58 ft
- November 9, 2006: 7.75 ft
Nearby
Upstream, downstream and the gauges around this one.
- UpstreamSaint Mary River at Babb
- Saint Mary Canal at Babb at St Mary Crossing
- North Fork Milk River at St Mary Canal near Browning
- Saint Mary Canal at Babb
- North Fork Milk River at International boundary near Browning
- Swiftcurrent Creek at Sherburne nr Babb
- Swiftcurrent Creek at Sherburne Reservoir near Babb
- South Fork Milk River at Babb
What this means
Forecasts by the Missouri Basin River Forecast Center. Forecasts are issued as needed during times of high water, but are not routinely available. 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.