Reservoir · Wyoming · United States · BOR RISE
Pilot Butte Reservoir and Dam
85.0% full
Capacity
41.57 hm³
Volume stored
35 hm³
Coordinates
43.200°N, 108.750°W
Last updated
2026-07-28
Current fill
85.0%vs 7 days ago
+0.9%gaining
vs 1 year ago
+13.5%year-over-year
7-day trend
→stable
Data source: BOR RISE — US Bureau of Reclamation — 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: 2026-07-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 43.200, -108.750 · Open in Google Maps
About Pilot Butte Reservoir and Dam
As of July 28, 2026, Pilot Butte Reservoir and Dam is filled to 85.0% of its total capacity, holding roughly 35 hm³ of water out of a maximum 42 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.9 pts), and it is 13.5 points above its level on the same date a year earlier.
Across the readings we hold for Pilot Butte Reservoir and Dam — 1817 data points between July 31, 2021 and July 28, 2026 — the level has ranged from a low of 16.4% (September 25, 2021) to a high of 90.0% (June 16, 2025). On average the reservoir is fullest around April and at its lowest around September.
It is operated by BOR primarily for multiple purposes. It lies within the Wyoming basin at 43.200°N, 108.750°W.
Key facts
- Current fill level
- 85.0%
- Water stored
- 35 hm³
- Total capacity
- 42 hm³
- 7-day change
- ▲ 0.9 pts
- Year-on-year
- ▲ 13.5 pts
- Primary use
- Multipurpose
- River basin
- Wyoming
- Operator
- BOR
- Coordinates
- 43.200°N, 108.750°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 85.0% | 35 |
| 27 Jul 2026 | 84.1% | 35 |
| 26 Jul 2026 | 83.5% | 35 |
| 25 Jul 2026 | 83.7% | 35 |
| 24 Jul 2026 | 84.0% | 35 |
| 23 Jul 2026 | 83.6% | 35 |
| 22 Jul 2026 | 82.9% | 34 |
| 21 Jul 2026 | 83.0% | 35 |
| 20 Jul 2026 | 83.0% | 35 |
| 19 Jul 2026 | 83.5% | 35 |
| 18 Jul 2026 | 83.6% | 35 |
| 17 Jul 2026 | 83.8% | 35 |
Frequently asked questions
What is the current water level of Pilot Butte Reservoir and Dam?
As of July 28, 2026, Pilot Butte Reservoir and Dam is at 85.0% of its capacity, holding approximately 35 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Pilot Butte Reservoir and Dam reservoir full?
No. As of July 28, 2026, Pilot Butte Reservoir and Dam is high at 85.0% of its capacity, so it is not full.
Is the water level at Pilot Butte Reservoir and Dam rising or falling?
The level at Pilot Butte Reservoir and Dam has been broadly stable over the latest week on record (+0.9 points).
How much water can Pilot Butte Reservoir and Dam hold?
Pilot Butte Reservoir and Dam has a total capacity of 42 hm³.
Where is Pilot Butte Reservoir and Dam reservoir located?
Pilot Butte Reservoir and Dam is located in Wyoming, United States, within the Wyoming basin (coordinates 43.200°N, 108.750°W).
What is Pilot Butte Reservoir and Dam used for?
Pilot Butte Reservoir and Dam is used primarily for multiple purposes, and is managed by BOR.