Montana Lake Levels Today
7 lakes and reservoirs · updated Sep 21, 2026
Lake Levels Today tracks 7 lakes and reservoirs in Montana. Of the 7 with a published full pool, 1 are at or above it and 0 are well below it. The highest relative to full pool is Flathead Lake (+0.05 ft) and the lowest is Clark Canyon Reservoir (−31.36 ft). Over the last 24 hours 2 rose and 1 fell by more than a twentieth of a foot; the rest held steady.
Every figure is the operating agency's own gauge reading, republished once a day. Open a lake for its staff gauge, a one-year chart, pool elevations and the source link. Elevations are in feet above the agency's vertical datum, so compare lakes by their distance from full pool, not by raw elevation.
| Lake | Elevation (ft) | From full | 24h |
|---|---|---|---|
| Fort Peck Lake | 2,222.45 | −11.55 ft | −0.04 ft |
| Lake Koocanusa | 2,444.76 | −14.24 ft | −0.05 ft |
| Canyon Ferry Reservoir | 3,785.41 | −11.59 ft | −0.06 ft |
| Clark Canyon Reservoir | 5,514.74 | −31.36 ft | +0.07 ft |
| Flathead Lake | 2,893.05 | +0.05 ft | −0.01 ft |
| Tiber Reservoir | 2,988.17 | −4.83 ft | −0.02 ft |
| Yellowtail Reservoir | 3,623.41 | −16.59 ft | +0.11 ft |
Montana lake level questions
Which Montana lake is lowest right now?
Clark Canyon Reservoir, at 5,514.74 ft, −31.36 ft from its full pool of 5,546.10 ft.
How many Montana lakes are full?
1 of the 7 Montana lakes with a published full pool are within half a foot of it or above, and 0 are more than halfway down the conservation pool.
How often are Montana lake levels updated here?
Once a day. The readings on this page were pulled Sep 21, 2026; each lake page shows the exact timestamp of its gauge reading.