Flathead Lake Water Level Today
Montana · near Kalispell · Above flood pool
- Elevation
- 2,893.05 ft
- From full pool
- +0.05 ft
- Percent of pool
- 100.5%
- 24-hour change
- −0.01 ft
- 7-day change
- −0.04 ft
- Reading
- Sep 21, 2026 · USACE
Last year at Flathead Lake
Flathead Lake is 0.05 ft above full pool, at 2,893.05 ft, above its flood pool, down 0.01 ft in the last 24 hours. That puts the lake at 100.5 percent of its conservation pool. The lake is 0.1 ft above the top of its flood pool.
Over the last 7 days the level held steady, and over 30 days it held steady. In the 397 days of readings on this page the high was 2,893.14 ft on Jul 2, 2026 and the low was 2,886.36 ft on Mar 20, 2026, a range of 6.78 ft.
The reading is the U.S. Army Corps of Engineers gauge at Flathead Lk @ SELIS KSANKA QLISPE Dam nr Polson, near Kalispell, taken Sep 21, 2026 and referenced to the NGVD29 datum. This page is rebuilt once a day from the agency feed; it is not a live gauge, so during a fast rise or a scheduled release check the USACE page for hourly values.
Flathead Lake pool elevations
| Current elevation | 2,893.05 ft |
|---|---|
| Full pool (top of conservation) | 2,893.00 ft |
| Top of flood pool | 2,893.00 ft |
| Bottom of conservation pool | 2,883.00 ft |
| Top of dam | 2,920.00 ft |
| Inflow | 6,582 cfs |
| Outflow | 7,130 cfs |
| 30-day change | −0.03 ft |
| 1-year high | 2,893.14 ft (Jul 2, 2026) |
| 1-year low | 2,886.36 ft (Mar 20, 2026) |
| Vertical datum | NGVD29 |
| Operating agency | U.S. Army Corps of Engineers, NWS district |
Source: U.S. Army Corps of Engineers. Read what full pool and flood pool mean.
More lakes in Montana
- Fort Peck Lake 2,222.45 ft, −11.55 ft from full
- Lake Koocanusa 2,444.76 ft, −14.24 ft from full
- Canyon Ferry Reservoir 3,785.41 ft, −11.59 ft from full
- Clark Canyon Reservoir 5,514.74 ft, −31.36 ft from full
- Tiber Reservoir 2,988.17 ft, −4.83 ft from full
- Yellowtail Reservoir 3,623.41 ft, −16.59 ft from full
Flathead Lake level questions
What is the water level of Flathead Lake today?
Flathead Lake is at 2,893.05 ft as of Sep 21, 2026, +0.05 ft relative to full pool (2,893.00 ft). The 24-hour change is −0.01 ft.
What is full pool at Flathead Lake?
Full pool, the top of the conservation pool, is 2,893.00 ft (NGVD29). Above that, water is stored temporarily in the flood pool up to 2,893.00 ft. The bottom of the conservation pool is 2,883.00 ft.
Is Flathead Lake rising or falling?
Over the last 24 hours the level is −0.01 ft; over 7 days it held steady, and over 30 days it held steady.
Where does this Flathead Lake level come from?
From the U.S. Army Corps of Engineers (USACE) public data feed for Flathead Lk @ SELIS KSANKA QLISPE Dam nr Polson. Lake Levels Today republishes the agency's daily value without adjustment and links to the source below.