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Flathead Lake is the largest freshwater lake in Montana, located in the town of Polson. The lake was formed by glaciers during the last ice age and has a surface area of 191.5 square miles. Its hydrology is dominated by the Flathead River, which is the primary surface flow provider, and snowpack, which provides the majority of the lake's water. The lake serves as a vital source of irrigation water for local agriculture and supports a variety of recreational activities, including fishing, boating, and swimming. The lake is also home to several species of fish, including trout, salmon, and bass. Its history includes being a sacred site for the Salish and Kootenai tribes and being explored by Lewis and Clark in 1805. Today, Flathead Lake is considered one of Montana's most treasured natural resources.
Elevation Of Reservoir Water Surface Above Datum, Ft 24hr Change | 0% |
Percent of Normal | None% |
Minimum |
2,883.11 ft
2008-04-10 |
Maximum |
2,893.59 ft
2022-06-25 |
Average | 2,885 ft |
Discharge | Stage | Elevation | |
N F FLATHEAD RIVER NR COLUMBIA FALLS MT
2024-04-11T01:45:00.000-06:00 |
2500cfs | 2.64ft | 3151ft |
MIDDLE FORK FLATHEAD RIVER NR WEST GLACIER MT
2025-02-13T00:45:00.000-07:00 |
270cfs | 1.41ft | 3131ft |
FLATHEAD RIVER AT COLUMBIA FALLS MT
2025-02-18T00:45:00.000-07:00 |
3520cfs | 3.73ft | 2987ft |
S F FLATHEAD RIVER NR COLUMBIA FALLS MT
2025-02-18T00:45:00.000-07:00 |
3040cfs | 6.28ft | 3049ft |
SWAN RIVER NEAR BIGFORK MT
2025-02-18T01:00:00.000-07:00 |
356cfs | 2.09ft | 3081ft |
FLATHEAD RIVER NEAR BIGFORK MT
2014-09-30T23:45:00.000-06:00 |
4310cfs | ft | 2889ft |
S F FLATHEAD R AB TWIN C NR HUNGRY HORSE MT
2024-04-11T01:45:00.000-06:00 |
1910cfs | 6.69ft | 3586ft |