Reservoir · Montana · United States · BOR RISE
Lake Como
Lake Como and Como Dam
15.5% full
Capacity
47.48 hm³
Volume stored
7 hm³
Vs month average
141% of normal
Coordinates
46.062°N, 114.233°W
Last updated
2026-10-14
Current fill
15.5%vs 7 days ago
-1.2%losing
vs 1 year ago
+6.0%year-over-year
7-day trend
→stable
Drought context
Storage vs October average
141%of normal
15.5% full on 2026-10-14, against an average of 11.0% for October across 6 years of readings (+4.5 points).
Drought Monitor at this site · 13 October 2026
Nonenot in a drought category
Lake Como's coordinates fall outside every category on the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Montana 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: 2026-10-14.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 46.062, -114.233 · Open in Google Maps
About Lake Como
As of October 14, 2026, Lake Como is filled to 15.5% of its total capacity, holding roughly 7 hm³ of water out of a maximum 47 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has held broadly steady (-1.2 pts), and it is 6.0 points above its level on the same date a year earlier.
Across the readings we hold for Lake Como — 2186 data points between October 16, 2021 and October 14, 2026 — the level has ranged from a low of 9.2% (October 16, 2021) to a high of 102.3% (June 29, 2022). 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 Montana basin at 46.062°N, 114.233°W.
Key facts
- Current fill level
- 15.5%
- Water stored
- 7 hm³
- Total capacity
- 47 hm³
- 7-day change
- ▼ 1.2 pts
- Year-on-year
- ▲ 6.0 pts
- Primary use
- Multipurpose
- River basin
- Montana
- Operator
- BOR
- Coordinates
- 46.062°N, 114.233°W
- Last updated
- October 14, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 14 Oct 2026 | 15.5% | 7 |
| 13 Oct 2026 | 15.6% | 7 |
| 12 Oct 2026 | 15.8% | 8 |
| 11 Oct 2026 | 16.0% | 8 |
| 10 Oct 2026 | 16.1% | 8 |
| 9 Oct 2026 | 16.3% | 8 |
| 8 Oct 2026 | 16.5% | 8 |
| 7 Oct 2026 | 16.7% | 8 |
| 6 Oct 2026 | 16.9% | 8 |
| 5 Oct 2026 | 17.1% | 8 |
| 4 Oct 2026 | 17.3% | 8 |
| 3 Oct 2026 | 17.5% | 8 |