Jackson Lake Water Level Today
Wyoming · near Idaho Falls · Well below full pool
- Elevation
- 6,734.22 ft
- From full pool
- −33.78 ft
- Percent of pool
- n/a
- 24-hour change
- −0.28 ft
- 7-day change
- −1.61 ft
- Reading
- Sep 21, 2026 · USACE
Last year at Jackson Lake
Jackson Lake is 33.78 ft below full pool, at 6,734.22 ft, down 0.28 ft in the last 24 hours. The top of the flood pool is 36.0 ft higher, at 6,770.20 ft.
Over the last 7 days the level fell 1.61 ft, and over 30 days it fell 11.65 ft. In the 396 days of readings on this page the high was 6,767.92 ft on May 20, 2026 and the low was 6,734.22 ft on Sep 21, 2026, a range of 33.70 ft.
The reading is the U.S. Army Corps of Engineers gauge at Snake R On Jackson Lk @ Dam, near Idaho Falls, 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.
Jackson Lake pool elevations
| Current elevation | 6,734.22 ft |
|---|---|
| Full pool (top of conservation) | 6,768.00 ft |
| Top of flood pool | 6,770.20 ft |
| Top of dam | 6,780.00 ft |
| Inflow | -582 cfs |
| Outflow | 1,938 cfs |
| 30-day change | −11.65 ft |
| 1-year high | 6,767.92 ft (May 20, 2026) |
| 1-year low | 6,734.22 ft (Sep 21, 2026) |
| Vertical datum | NGVD29 |
| Operating agency | U.S. Army Corps of Engineers, NWW district |
Source: U.S. Army Corps of Engineers. Read what full pool and flood pool mean.
More lakes in Wyoming
- Boysen Reservoir 4,709.88 ft, −15.12 ft from full
- Glendo Reservoir 4,591.54 ft, −43.46 ft from full
- Keyhole Reservoir 4,084.03 ft, −15.27 ft from full
Jackson Lake level questions
What is the water level of Jackson Lake today?
Jackson Lake is at 6,734.22 ft as of Sep 21, 2026, −33.78 ft relative to full pool (6,768.00 ft). The 24-hour change is −0.28 ft.
What is full pool at Jackson Lake?
Full pool, the top of the conservation pool, is 6,768.00 ft (NGVD29). Above that, water is stored temporarily in the flood pool up to 6,770.20 ft.
Is Jackson Lake rising or falling?
Over the last 24 hours the level is −0.28 ft; over 7 days it fell 1.61 ft, and over 30 days it fell 11.65 ft.
Where does this Jackson Lake level come from?
From the U.S. Army Corps of Engineers (USACE) public data feed for Snake R On Jackson Lk @ Dam. Lake Levels Today republishes the agency's daily value without adjustment and links to the source below.