Boysen Reservoir Water Level Today
Wyoming · near Riverton · Below full pool
- Elevation
- 4,709.88 ft
- From full pool
- −15.12 ft
- Percent of pool
- 62.2%
- 24-hour change
- +0.23 ft
- 7-day change
- +0.16 ft
- Reading
- Sep 21, 2026 · USACE
Last year at Boysen Reservoir
Boysen Reservoir is 15.12 ft below full pool, at 4,709.88 ft, up 0.23 ft in the last 24 hours. That puts the lake at 62.2 percent of its conservation pool. The top of the flood pool is 22.3 ft higher, at 4,732.20 ft.
Over the last 7 days the level rose 0.16 ft, and over 30 days it fell 1.33 ft. In the 399 days of readings on this page the high was 4,715.03 ft on Aug 17, 2025 and the low was 4,709.54 ft on Sep 19, 2026, a range of 5.49 ft.
The reading is the U.S. Army Corps of Engineers gauge at Boysen Dam & Reservoir, near Riverton, taken Sep 21, 2026 and referenced to the LOCAL 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.
Boysen Reservoir pool elevations
| Current elevation | 4,709.88 ft |
|---|---|
| Full pool (top of conservation) | 4,725.00 ft |
| Top of flood pool | 4,732.20 ft |
| Bottom of conservation pool | 4,685.00 ft |
| Top of dam | 4,758.00 ft |
| Inflow | 2,605 cfs |
| Outflow | 885 cfs |
| 30-day change | −1.33 ft |
| 1-year high | 4,715.03 ft (Aug 17, 2025) |
| 1-year low | 4,709.54 ft (Sep 19, 2026) |
| Vertical datum | LOCAL |
| Operating agency | U.S. Army Corps of Engineers, NWO district |
Source: U.S. Army Corps of Engineers. Read what full pool and flood pool mean.
More lakes in Wyoming
- Jackson Lake 6,734.22 ft, −33.78 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
Boysen Reservoir level questions
What is the water level of Boysen Reservoir today?
Boysen Reservoir is at 4,709.88 ft as of Sep 21, 2026, −15.12 ft relative to full pool (4,725.00 ft). The 24-hour change is +0.23 ft.
What is full pool at Boysen Reservoir?
Full pool, the top of the conservation pool, is 4,725.00 ft (LOCAL). Above that, water is stored temporarily in the flood pool up to 4,732.20 ft. The bottom of the conservation pool is 4,685.00 ft.
Is Boysen Reservoir rising or falling?
Over the last 24 hours the level is +0.23 ft; over 7 days it rose 0.16 ft, and over 30 days it fell 1.33 ft.
Where does this Boysen Reservoir level come from?
From the U.S. Army Corps of Engineers (USACE) public data feed for Boysen Dam & Reservoir. Lake Levels Today republishes the agency's daily value without adjustment and links to the source below.