Reservoir · Idaho · United States · BOR RISE
Henrys Lake
Henrys Lake and Henrys Lake Dam
70.8% full
Capacity
115.29 hm³
Volume stored
82 hm³
Vs month average
87% of normal
Coordinates
44.597°N, 111.354°W
Last updated
2026-10-14
Current fill
70.8%vs 7 days ago
+0.5%gaining
vs 1 year ago
-11.5%year-over-year
7-day trend
→stable
Drought context
Storage vs October average
87%of normal
70.8% full on 2026-10-14, against an average of 81.1% for October across 6 years of readings (-10.3 points).
Drought Monitor at this site · 13 October 2026
D0abnormally dry
The ground at Henrys Lake's coordinates falls inside the D0 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Idaho drought figures →
Data source: BOR RISE — US Bureau of Reclamation — daily reservoir storage volume. Design capacity is unavailable for this site, so fill % is estimated against the 5-year maximum storage and may overstate fullness. 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. 44.597, -111.354 · Open in Google Maps
About Henrys Lake
As of October 14, 2026, Henrys Lake is filled to 70.8% of its total capacity, holding roughly 82 hm³ of water out of a maximum 115 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 (+0.5 pts), and it is 11.5 points below its level on the same date a year earlier.
Across the readings we hold for Henrys Lake — 2187 data points between October 16, 2021 and October 14, 2026 — the level has ranged from a low of 69.2% (September 6, 2026) to a high of 100.0% (June 19, 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 Idaho basin at 44.597°N, 111.354°W.
Key facts
- Current fill level
- 70.8%
- Water stored
- 82 hm³
- Total capacity
- 115 hm³
- 7-day change
- ▲ 0.5 pts
- Year-on-year
- ▼ 11.5 pts
- Primary use
- Multipurpose
- River basin
- Idaho
- Operator
- BOR
- Coordinates
- 44.597°N, 111.354°W
- Last updated
- October 14, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 14 Oct 2026 | 70.8% | 82 |
| 13 Oct 2026 | 70.9% | 82 |
| 12 Oct 2026 | 71.5% | 82 |
| 11 Oct 2026 | 71.0% | 82 |
| 10 Oct 2026 | 70.7% | 82 |
| 9 Oct 2026 | 70.1% | 81 |
| 8 Oct 2026 | 70.1% | 81 |
| 7 Oct 2026 | 70.3% | 81 |
| 6 Oct 2026 | 70.4% | 81 |
| 5 Oct 2026 | 70.4% | 81 |
| 4 Oct 2026 | 70.3% | 81 |
| 3 Oct 2026 | 70.3% | 81 |