Great Falls Lake level history
In the 367 days we have on record (Nov 3, 2025 to Nov 4, 2026), the highest level was 803.26 ft on May 24, 2026 and the lowest was 786.93 ft on Jan 9, 2026.
As of Nov 4, 2026, 6:00 AM CST, Great Falls Lake is at 788.44 ft. The level has fallen 1.06 ft over the last 7 days.
Level
| Date | Elevation | Daily change | Storage |
|---|---|---|---|
| Nov 4, 2026 | 788.44 ft | −0.03 ft | — |
| Nov 3, 2026 | 788.47 ft | −0.31 ft | — |
| Nov 2, 2026 | 788.78 ft | −0.31 ft | — |
| Nov 1, 2026 | 789.09 ft | −0.06 ft | — |
| Oct 31, 2026 | 789.15 ft | −0.11 ft | — |
| Oct 30, 2026 | 789.26 ft | −0.12 ft | — |
| Oct 29, 2026 | 789.38 ft | −0.12 ft | — |
| Oct 28, 2026 | 789.50 ft | −0.12 ft | — |
| Oct 27, 2026 | 789.62 ft | −0.12 ft | — |
| Oct 26, 2026 | 789.74 ft | −0.12 ft | — |
| Oct 25, 2026 | 789.86 ft | −0.15 ft | — |
| Oct 24, 2026 | 790.01 ft | −0.15 ft | — |
| Oct 23, 2026 | 790.16 ft | −0.14 ft | — |
| Oct 22, 2026 | 790.30 ft | −0.14 ft | — |
In the 367 days we have on record (Nov 3, 2025 to Nov 4, 2026), the highest level was 803.26 ft on May 24, 2026 and the lowest was 786.93 ft on Jan 9, 2026.
788.44 ft as of Nov 4, 2026, 6:00 AM CST, reported by the U.S. Army Corps of Engineers.
Every 3 hours. The gauge reports every hour.
In the period we have (since Nov 3, 2025): 803.26 ft and 786.93 ft.
Data: U.S. Army Corps of Engineers, station GGRT1-GREAT_FALLS (official page). For information only. Not for navigation or flood safety decisions. Check the official source. LakeLevelHQ is not affiliated with any government agency.