Reservoir · Wyoming · United States · USACE CWMS
Pilot Butte Reservoir, WY
71.0% full
Capacity
41.57 hm³
Volume stored
30 hm³
Coordinates
43.196°N, 108.756°W
Last updated
2026-06-11
Current fill
71.0%vs 7 days ago
-0.3%losing
vs 1 year ago
-15.7%year-over-year
7-day trend
→stable
Data source: USACE CWMS — US Army Corps of Engineers — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-06-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 43.196, -108.756 · Open in Google Maps
About Pilot Butte Reservoir, WY
As of June 11, 2026, Pilot Butte Reservoir, WY is filled to 71.0% of its total capacity, holding roughly 30 hm³ of water out of a maximum 42 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (-0.3 pts), and it is 15.7 points below its level on the same date a year earlier.
Across the readings we hold for Pilot Butte Reservoir, WY — 1814 data points between June 13, 2021 and June 11, 2026 — the level has ranged from a low of 16.4% (September 26, 2021) to a high of 90.0% (June 17, 2025). On average the reservoir is fullest around April and at its lowest around September.
It is operated by USACE primarily for multiple purposes. It lies within the Wyoming basin at 43.196°N, 108.756°W.
Key facts
- Current fill level
- 71.0%
- Water stored
- 30 hm³
- Total capacity
- 42 hm³
- 7-day change
- ▼ 0.3 pts
- Year-on-year
- ▼ 15.7 pts
- Primary use
- Multipurpose
- River basin
- Wyoming
- Operator
- USACE
- Coordinates
- 43.196°N, 108.756°W
- Last updated
- June 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Jun 2026 | 71.0% | 30 |
| 10 Jun 2026 | 71.3% | 30 |
| 9 Jun 2026 | 71.6% | 30 |
| 8 Jun 2026 | 71.3% | 30 |
| 7 Jun 2026 | 71.5% | 30 |
| 6 Jun 2026 | 71.4% | 30 |
| 5 Jun 2026 | 71.4% | 30 |
| 4 Jun 2026 | 72.2% | 30 |
| 3 Jun 2026 | 72.1% | 30 |
| 2 Jun 2026 | 72.2% | 30 |
| 1 Jun 2026 | 72.3% | 30 |
| 31 May 2026 | 71.6% | 30 |
Frequently asked questions
What is the current water level of Pilot Butte Reservoir, WY?
As of June 11, 2026, Pilot Butte Reservoir, WY is at 71.0% of its capacity, holding approximately 30 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Pilot Butte Reservoir, WY reservoir full?
No. As of June 11, 2026, Pilot Butte Reservoir, WY is within its normal operating range at 71.0% of its capacity, so it is not full.
Is the water level at Pilot Butte Reservoir, WY rising or falling?
The level at Pilot Butte Reservoir, WY has been broadly stable over the latest week on record (-0.3 points).
How much water can Pilot Butte Reservoir, WY hold?
Pilot Butte Reservoir, WY has a total capacity of 42 hm³.
Where is Pilot Butte Reservoir, WY reservoir located?
Pilot Butte Reservoir, WY is located in Wyoming, United States, within the Wyoming basin (coordinates 43.196°N, 108.756°W).
What is Pilot Butte Reservoir, WY used for?
Pilot Butte Reservoir, WY is used primarily for multiple purposes, and is managed by USACE.