Reservoir · Colorado · United States · BOR RISE
Shadow Mountain Lake
Shadow Mountain Lake and Dam
91.9% full
Capacity
22.66 hm³
Volume stored
21 hm³
Vs month average
100% of normal
Coordinates
40.207°N, 105.842°W
Last updated
2026-10-27
Current fill
91.9%vs 7 days ago
0.0 ppstable
vs 1 year ago
+1.0 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
100%of normal
91.9% full on 2026-10-27, against an average of 91.9% for October across 6 years of readings (0.0 points).
Drought Monitor at this site · 20 October 2026
D3extreme drought
The ground at Shadow Mountain Lake'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: 2026-10-27.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.207°N, 105.842°W · Open in Google Maps
About Shadow Mountain Lake
As of October 27, 2026, Shadow Mountain Lake is filled to 91.9% of its total capacity, holding 20.82 hm³ of water out of a maximum 22.66 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.0 pp), and it is 1.0 points above its level on the same date a year earlier.
Across the readings we hold for Shadow Mountain Lake — 1951 data points between October 29, 2021 and October 27, 2026 — the level has ranged from a low of 89.1% (June 12, 2022) to a high of 93.6% (May 26, 2026). On average the reservoir is fullest around January and at its lowest around June.
It is operated by BOR primarily for multiple purposes. It is at 40.207°N, 105.842°W.
Key facts
- Current fill level
- 91.9% of total capacity
- Water stored
- 20.82 hm³
- Total capacity
- 22.66 hm³
- 7-day change
- No change
- Year-on-year
- ▲ 1.0 pp
- Primary use
- Multipurpose
- Operator
- BOR
- Coordinates
- 40.207°N, 105.842°W
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Oct 2026 | 91.9% | 20.82 |
| 26 Oct 2026 | 91.9% | 20.83 |
| 25 Oct 2026 | 91.9% | 20.83 |
| 24 Oct 2026 | 91.9% | 20.83 |
| 23 Oct 2026 | 91.7% | 20.78 |
| 22 Oct 2026 | 91.9% | 20.83 |
| 21 Oct 2026 | 92.1% | 20.86 |
| 20 Oct 2026 | 91.9% | 20.82 |
| 19 Oct 2026 | 92.0% | 20.85 |
| 18 Oct 2026 | 92.1% | 20.86 |
| 17 Oct 2026 | 92.0% | 20.85 |
| 16 Oct 2026 | 91.7% | 20.77 |