Of the 8 Montana lakes here with a published full pool, 8 sit below it. Another 4 have no full-pool figure and read against their own records instead. The newest reading on this page is from October 1, 2026.
| Lake | Level now | Full pool | Against full pool | Reading |
|---|---|---|---|---|
| Flathead Lake Energy Keepers Inc (CSKT) - SKQ Dam; USGS gauge | 2892.76 ft | 2893.00 ft | 0.2 ft below full pool — unusually high for late September | September 30, 2026 |
| Fort Peck Lake USACE Omaha District / Missouri River Basin Water Management | 2222.20 ft | 2246.00 ft | 23.8 ft below full pool — typical for early October | October 1, 2026 |
| Bighorn Lake US Bureau of Reclamation (Yellowtail Dam) | 3624.17 ft | 3640.00 ft | 15.8 ft below full pool — on the low side for early October | October 1, 2026 |
| Canyon Ferry Lake US Bureau of Reclamation (Montana Area Office) | 3784.81 ft | 3797.00 ft | 12.2 ft below full pool — typical for early October | October 1, 2026 |
| Clark Canyon Reservoir Bureau of Reclamation (Clark Canyon Dam) | 5515.41 ft | 5546.10 ft | 30.7 ft below full pool — typical for early October | October 1, 2026 |
| Hebgen Lake NorthWestern Energy | 6530.37 ft | 6534.87 ft | 4.5 ft below full pool — this gauge's public record is too short for seasonal comparisons | September 30, 2026 |
| Helena Valley Reservoir Bureau of Reclamation (Helena Valley Dam) | 3819.30 ft | not published | Current reading shown; this gauge's public record is too short for seasonal comparisons. | October 1, 2026 |
| Hungry Horse Reservoir Bureau of Reclamation | 3544.62 ft | 3560.00 ft | 15.4 ft below full pool — typical for late September | September 30, 2026 |
| Lake Como Bureau of Reclamation / Bitter Root Irrigation District | 4207.64 ft | not published | Current reading shown; this gauge's public record is too short for seasonal comparisons. | September 30, 2026 |
| Lake Sherburne Bureau of Reclamation (Sherburne Dam) | 4743.44 ft | not published | Reading is typical for late September. | September 30, 2026 |
| Pishkun Reservoir Bureau of Reclamation (Sun River Project) | 4346.01 ft | not published | Current reading shown; this gauge's public record is too short for seasonal comparisons. | October 1, 2026 |
| Tiber Reservoir Bureau of Reclamation (Tiber Dam) | 2987.94 ft | 2993.00 ft | 5.1 ft below full pool — on the high side for early October | October 1, 2026 |
“Full pool” means the conservation pool — what that is, and what it is not. Lakes with no published figure are read against their own seasonal record instead.
Montana lake levels, asked and answered
What are the lake levels in Montana today?
Of the 8 Montana lakes here with a published full pool, 8 sit below it. Another 4 have no full-pool figure and read against their own records instead. The newest reading on this page is from October 1, 2026.
Which Montana lake is furthest below full pool?
Clark Canyon Reservoir is the furthest down of the Montana lakes on this page, at 30.7 ft below its full pool.
Where do these Montana lake levels come from?
Each row is the gauge the agency that runs the lake publishes — the Corps of Engineers, the Bureau of Reclamation, the state water agency or the US Geological Survey, depending on the lake. Open a lake and its own page re-reads that gauge as the page loads, wherever the agency lets a browser do it.