Reservoir · Montana · United States · BOR RISE
Hungry Horse Reservoir, Dam, and Powerplant
95.8% full
Capacity
4,277.72 hm³
Volume stored
4098 hm³
Coordinates
48.341°N, 114.014°W
Last updated
2026-08-12
Current fill
95.8%vs 7 days ago
-1.0%losing
vs 1 year ago
-0.9%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: 2026-08-12.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 48.341, -114.014 · Open in Google Maps
About Hungry Horse Reservoir, Dam, and Powerplant
As of August 12, 2026, Hungry Horse Reservoir, Dam, and Powerplant is filled to 95.8% of its total capacity, holding roughly 4,098 hm³ of water out of a maximum 4,278 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-1.0 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Hungry Horse Reservoir, Dam, and Powerplant — 2190 data points between August 15, 2021 and August 12, 2026 — the level has ranged from a low of 68.9% (April 9, 2023) to a high of 99.8% (June 22, 2026). On average the reservoir is fullest around July and at its lowest around April.
It is operated by BOR primarily for multiple purposes. It lies within the Montana basin at 48.341°N, 114.014°W.
Key facts
- Current fill level
- 95.8%
- Water stored
- 4,098 hm³
- Total capacity
- 4,278 hm³
- 7-day change
- ▼ 1.0 pts
- Year-on-year
- ▼ 0.9 pts
- Primary use
- Multipurpose
- River basin
- Montana
- Operator
- BOR
- Coordinates
- 48.341°N, 114.014°W
- Last updated
- August 12, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 12 Aug 2026 | 95.8% | 4,098 |
| 11 Aug 2026 | 96.0% | 4,105 |
| 10 Aug 2026 | 96.1% | 4,112 |
| 9 Aug 2026 | 96.3% | 4,118 |
| 8 Aug 2026 | 96.4% | 4,124 |
| 7 Aug 2026 | 96.6% | 4,130 |
| 6 Aug 2026 | 96.7% | 4,137 |
| 5 Aug 2026 | 96.8% | 4,143 |
| 4 Aug 2026 | 97.0% | 4,149 |
| 3 Aug 2026 | 97.1% | 4,155 |
| 2 Aug 2026 | 97.3% | 4,161 |
| 1 Aug 2026 | 97.4% | 4,168 |
Frequently asked questions
What is the current water level of Hungry Horse Reservoir, Dam, and Powerplant?
As of August 12, 2026, Hungry Horse Reservoir, Dam, and Powerplant is at 95.8% of its capacity, holding approximately 4,098 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Hungry Horse Reservoir, Dam, and Powerplant reservoir full?
Hungry Horse Reservoir, Dam, and Powerplant is essentially full, sitting at 95.8% of capacity as of August 12, 2026.
Is the water level at Hungry Horse Reservoir, Dam, and Powerplant rising or falling?
The level at Hungry Horse Reservoir, Dam, and Powerplant has been broadly stable over the latest week on record (-1.0 points).
How much water can Hungry Horse Reservoir, Dam, and Powerplant hold?
Hungry Horse Reservoir, Dam, and Powerplant has a total capacity of 4,278 hm³.
Where is Hungry Horse Reservoir, Dam, and Powerplant reservoir located?
Hungry Horse Reservoir, Dam, and Powerplant is located in Montana, United States, within the Montana basin (coordinates 48.341°N, 114.014°W).
What is Hungry Horse Reservoir, Dam, and Powerplant used for?
Hungry Horse Reservoir, Dam, and Powerplant is used primarily for multiple purposes, and is managed by BOR.