Rivers in Maine
Allagash River above Allagash
Below flood stage
1.89ftStage
Observed Tue, Sep 22, 6:00 PM EDT
- Flood stage
- 15.00 ft
- Record crest
- 19.78 ft1991
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 19.00 ft |
| Moderate flood | 17.00 ft |
| Minor flood | 15.00 ft |
| Action | 13.00 ft |
- 19.00 ftWidespread significant flooding upstream of Eliza Hole Rapids. Michaud Tote Road and Inn Road impassable. Numerous camp roads flooded. River side campsites between Allagash Falls and Eliza Hole Rapids completely inundated. Flooding similar to April 1983 and 1991.
- 17.00 ftSignificant flooding of Michaud Tote Road and Inn Road in the town of Allagash. Floodwaters threaten Route 161 in the town of Allagash combined with St. John River conditions. Campsites inundated between Allagash Falls and Eliza Hole Rapids.
- 15.00 ftMinor low lying flooding occurs between Allagash Falls and the town of Allagash. River campsites flooded between McGargle Rocks to Eliza Hole Rapids.
- 13.00 ftRiver approaches bankfull. River begins to threaten low lying campsites between Allagash Falls and Eliza Hole Rapids.
Flood outlook
Chance of flooding, September to November
| 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 21, 2026.
Crest history
29 crests on NOAA’s list since 1933.
| # | Date | Stage |
|---|---|---|
| 1 | April 10, 1991 | 19.78 ft |
| 2 | April 18, 1983 | 19.48 ft |
| 3 | April 6, 1988 | 17.55 ft |
| 4 | April 30, 2008 | 14.89 ft |
| 5 | April 3, 1975 | 14.43 ft |
| 6 | April 22, 1933 | 14.22 ft |
| 7 | April 23, 1960 | 14.16 ft |
| 8 | April 26, 1970 | 13.83 ft |
| 9 | April 24, 2007 | 13.18 ft |
| 10 | May 1, 1939 | 13.14 ft |
| 11 | April 16, 1994 | 12.98 ft |
| 12 | April 5, 1981 | 12.76 ft |
| 13 | April 25, 1978 | 12.63 ft |
| 14 | April 17, 1984 | 12.37 ft |
| 15 | April 29, 1973 | 12.33 ft |
| 16 | March 31, 1953 | 12.28 ft |
| 17 | May 17, 1961 | 12.21 ft |
| 18 | April 23, 2019 | 11.91 ft |
| 19 | April 28, 2018 | 11.84 ft |
| 20 | May 5, 2011 | 11.10 ft |
| 21 | April 5, 2010 | 10.22 ft |
| 22 | April 19, 2023 | 10.11 ft |
| 23 | April 29, 2017 | 10.03 ft |
| 24 | April 17, 2022 | 9.28 ft |
| 25 | May 3, 2020 | 8.77 ft |
Most recent crests
- April 28, 2025: 8.72 ft
- April 14, 2024: 8.56 ft
- December 19, 2023: 8.02 ft
- April 19, 2023: 10.11 ft
- April 17, 2022: 9.28 ft
- April 11, 2021: 7.63 ft
- May 3, 2020: 8.77 ft
- April 23, 2019: 11.91 ft
- April 28, 2018: 11.84 ft
- April 29, 2017: 10.03 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Northeast River Forecast Center. Forecasts are issued as needed during times of high water, but are not routinely available. Stage may be affected by ice. Stage may be affected by ice.
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.