Reservoir · Colorado · United States · BOR RISE
Vallecito Reservoir
Vallecito Reservoir and Dam
20.6% full
Capacity
159.98 hm³
Volume stored
33 hm³
Coordinates
37.390°N, 107.556°W
Last updated
2026-09-09
Current fill
20.6%vs 7 days ago
-1.3%losing
vs 1 year ago
-10.2%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. 37.390, -107.556 · Open in Google Maps
About Vallecito Reservoir
As of September 9, 2026, Vallecito Reservoir is filled to 20.6% of its total capacity, holding roughly 33 hm³ of water out of a maximum 160 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-1.3 pts), and it is 10.2 points below its level on the same date a year earlier.
Across the readings we hold for Vallecito Reservoir — 1824 data points between September 12, 2021 and September 9, 2026 — the level has ranged from a low of 18.2% (October 2, 2021) to a high of 96.0% (June 24, 2023). On average the reservoir is fullest around June and at its lowest around October.
It is operated by BOR primarily for multiple purposes. It lies within the Colorado basin at 37.390°N, 107.556°W.
Key facts
- Current fill level
- 20.6%
- Water stored
- 33 hm³
- Total capacity
- 160 hm³
- 7-day change
- ▼ 1.3 pts
- Year-on-year
- ▼ 10.2 pts
- Primary use
- Multipurpose
- River basin
- Colorado
- Operator
- BOR
- Coordinates
- 37.390°N, 107.556°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 20.6% | 33 |
| 8 Sep 2026 | 20.8% | 33 |
| 7 Sep 2026 | 21.0% | 34 |
| 6 Sep 2026 | 21.1% | 34 |
| 5 Sep 2026 | 21.3% | 34 |
| 4 Sep 2026 | 21.4% | 34 |
| 3 Sep 2026 | 21.7% | 35 |
| 2 Sep 2026 | 21.9% | 35 |
| 1 Sep 2026 | 22.1% | 35 |
| 31 Aug 2026 | 22.4% | 36 |
| 30 Aug 2026 | 22.8% | 36 |
| 29 Aug 2026 | 23.1% | 37 |