Reservoir · Wyoming · United States · BOR RISE
Bull Lake Reservoir and Dam
82.9% full
Capacity
188.06 hm³
Volume stored
156 hm³
Coordinates
43.210°N, 109.042°W
Last updated
2026-07-28
Current fill
82.9%vs 7 days ago
+0.1%gaining
vs 1 year ago
+30.7%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. 43.210, -109.042 · Open in Google Maps
About Bull Lake Reservoir and Dam
As of July 28, 2026, Bull Lake Reservoir and Dam is filled to 82.9% of its total capacity, holding roughly 156 hm³ of water out of a maximum 188 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.1 pts), and it is 30.7 points above its level on the same date a year earlier.
Across the readings we hold for Bull Lake Reservoir and Dam — 1823 data points between July 31, 2021 and July 28, 2026 — the level has ranged from a low of 17.8% (September 2, 2025) to a high of 98.9% (July 17, 2022). On average the reservoir is fullest around July and at its lowest around October.
It is operated by BOR primarily for multiple purposes. It lies within the Wyoming basin at 43.210°N, 109.042°W.
Key facts
- Current fill level
- 82.9%
- Water stored
- 156 hm³
- Total capacity
- 188 hm³
- 7-day change
- ▲ 0.1 pts
- Year-on-year
- ▲ 30.7 pts
- Primary use
- Multipurpose
- River basin
- Wyoming
- Operator
- BOR
- Coordinates
- 43.210°N, 109.042°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 82.9% | 156 |
| 27 Jul 2026 | 82.8% | 156 |
| 26 Jul 2026 | 82.6% | 155 |
| 25 Jul 2026 | 82.4% | 155 |
| 24 Jul 2026 | 82.1% | 154 |
| 23 Jul 2026 | 81.3% | 153 |
| 22 Jul 2026 | 80.5% | 151 |
| 21 Jul 2026 | 80.0% | 151 |
| 20 Jul 2026 | 79.6% | 150 |
| 19 Jul 2026 | 79.1% | 149 |
| 18 Jul 2026 | 78.3% | 147 |
| 17 Jul 2026 | 77.3% | 145 |
Frequently asked questions
What is the current water level of Bull Lake Reservoir and Dam ?
As of July 28, 2026, Bull Lake Reservoir and Dam is at 82.9% of its capacity, holding approximately 156 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Bull Lake Reservoir and Dam reservoir full?
No. As of July 28, 2026, Bull Lake Reservoir and Dam is high at 82.9% of its capacity, so it is not full.
Is the water level at Bull Lake Reservoir and Dam rising or falling?
The level at Bull Lake Reservoir and Dam has been broadly stable over the latest week on record (+0.1 points).
How much water can Bull Lake Reservoir and Dam hold?
Bull Lake Reservoir and Dam has a total capacity of 188 hm³.
Where is Bull Lake Reservoir and Dam reservoir located?
Bull Lake Reservoir and Dam is located in Wyoming, United States, within the Wyoming basin (coordinates 43.210°N, 109.042°W).
What is Bull Lake Reservoir and Dam used for?
Bull Lake Reservoir and Dam is used primarily for multiple purposes, and is managed by BOR.