Reservoir · Colorado · United States · BOR RISE
Willow Creek Reservoir
Willow Creek Reservoir and Dam (CO)
61.8% full
Capacity
13.02 hm³
Volume stored
8 hm³
Vs month average
87% of normal
Coordinates
40.148°N, 105.942°W
Last updated
2026-10-28
Current fill
61.8%vs 7 days ago
+0.6 ppgaining
vs 1 year ago
-20.0 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
87%of normal
61.8% full on 2026-10-28, against an average of 70.7% for October across 6 years of readings (-8.9 points).
Drought Monitor at this site · 27 October 2026
D3extreme drought
The ground at Willow Creek Reservoir's coordinates falls inside the D3 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Colorado drought figures →
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: 2026-10-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.148°N, 105.942°W · Open in Google Maps
About Willow Creek Reservoir
As of October 28, 2026, Willow Creek Reservoir is filled to 61.8% of its total capacity, holding 8.05 hm³ of water out of a maximum 13.02 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 (+0.6 pp), and it is 20.0 points below its level on the same date a year earlier.
Across the readings we hold for Willow Creek Reservoir — 1951 data points between October 30, 2021 and October 28, 2026 — the level has ranged from a low of 50.2% (December 7, 2023) to a high of 89.9% (May 8, 2022). On average the reservoir is fullest around March and at its lowest around December.
It is operated by BOR primarily for multiple purposes. It is at 40.148°N, 105.942°W.
Key facts
- Current fill level
- 61.8% of total capacity
- Water stored
- 8.05 hm³
- Total capacity
- 13.02 hm³
- 7-day change
- ▲ 0.6 pp
- Year-on-year
- ▼ 20.0 pp
- Primary use
- Multipurpose
- Operator
- BOR
- Coordinates
- 40.148°N, 105.942°W
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 61.8% | 8.05 |
| 27 Oct 2026 | 61.8% | 8.04 |
| 26 Oct 2026 | 61.7% | 8.03 |
| 25 Oct 2026 | 61.5% | 8.01 |
| 24 Oct 2026 | 61.4% | 8 |
| 23 Oct 2026 | 61.4% | 7.99 |
| 22 Oct 2026 | 61.3% | 7.98 |
| 21 Oct 2026 | 61.2% | 7.97 |
| 20 Oct 2026 | 61.1% | 7.95 |
| 19 Oct 2026 | 61.0% | 7.94 |
| 18 Oct 2026 | 60.9% | 7.93 |
| 17 Oct 2026 | 60.8% | 7.92 |