Reservoir · Wyoming · United States · BOR RISE
Pathfinder Reservoir
Pathfinder Reservoir and Dam
17.8% full
Capacity
1,253.83 hm³
Volume stored
223 hm³
Coordinates
42.468°N, 106.854°W
Last updated
2026-09-09
Current fill
17.8%vs 7 days ago
-0.3%losing
vs 1 year ago
-13.4%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: 2026-09-09.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 42.468, -106.854 · Open in Google Maps
About Pathfinder Reservoir
As of September 9, 2026, Pathfinder Reservoir is filled to 17.8% of its total capacity, holding roughly 223 hm³ of water out of a maximum 1,254 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has held broadly steady (-0.3 pts), and it is 13.4 points below its level on the same date a year earlier.
Across the readings we hold for Pathfinder Reservoir — 1953 data points between September 12, 2021 and September 9, 2026 — the level has ranged from a low of 17.8% (September 8, 2026) to a high of 80.2% (May 29, 2024). On average the reservoir is fullest around June and at its lowest around August.
It is operated by BOR primarily for multiple purposes. It lies within the Wyoming basin at 42.468°N, 106.854°W.
Key facts
- Current fill level
- 17.8%
- Water stored
- 223 hm³
- Total capacity
- 1,254 hm³
- 7-day change
- ▼ 0.3 pts
- Year-on-year
- ▼ 13.4 pts
- Primary use
- Multipurpose
- River basin
- Wyoming
- Operator
- BOR
- Coordinates
- 42.468°N, 106.854°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 17.8% | 223 |
| 8 Sep 2026 | 17.8% | 224 |
| 7 Sep 2026 | 17.9% | 225 |
| 6 Sep 2026 | 18.0% | 225 |
| 5 Sep 2026 | 18.0% | 225 |
| 4 Sep 2026 | 18.0% | 226 |
| 3 Sep 2026 | 18.1% | 227 |
| 2 Sep 2026 | 18.1% | 227 |
| 1 Sep 2026 | 18.2% | 228 |
| 31 Aug 2026 | 18.2% | 228 |
| 30 Aug 2026 | 18.3% | 229 |
| 29 Aug 2026 | 18.3% | 230 |