Reservoir · Utah · United States · BOR RISE
Trial Lake
51.2% full
Capacity
2.05 hm³
Volume stored
1 hm³
Vs month average
109% of normal
Coordinates
40.680°N, 110.957°W
Last updated
2026-10-25
Current fill
51.2%vs 7 days ago
+2.4 ppgaining
vs 1 year ago
+31.2 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
109%of normal
51.2% full on 2026-10-25, against an average of 47.1% for October across 6 years of readings (+4.1 points).
Drought Monitor at this site · 20 October 2026
D1moderate drought
The ground at Trial Lake's coordinates falls inside the D1 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Utah 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: 2026-10-25.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.680°N, 110.957°W · Open in Google Maps
About Trial Lake
As of October 25, 2026, Trial Lake is filled to 51.2% of its total capacity, holding 1.05 hm³ of water out of a maximum 2.05 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has risen by 2.4 percentage points, and it is 31.2 points above its level on the same date a year earlier.
Across the readings we hold for Trial Lake — 1823 data points between October 29, 2021 and October 25, 2026 — the level has ranged from a low of 19.0% (September 25, 2025) to a high of 100.5% (May 18, 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 is at 40.680°N, 110.957°W.
Key facts
- Current fill level
- 51.2% of total capacity
- Water stored
- 1.05 hm³
- Total capacity
- 2.05 hm³
- 7-day change
- ▲ 2.4 pp
- Year-on-year
- ▲ 31.2 pp
- Primary use
- Multipurpose
- Operator
- BOR
- Coordinates
- 40.680°N, 110.957°W
- Last updated
- October 25, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 25 Oct 2026 | 51.2% | 1.05 |
| 24 Oct 2026 | 50.7% | 1.04 |
| 23 Oct 2026 | 50.7% | 1.04 |
| 22 Oct 2026 | 49.8% | 1.02 |
| 21 Oct 2026 | 49.8% | 1.02 |
| 20 Oct 2026 | 49.3% | 1.01 |
| 19 Oct 2026 | 49.3% | 1.01 |
| 18 Oct 2026 | 48.8% | 1 |
| 17 Oct 2026 | 48.3% | 0.99 |
| 16 Oct 2026 | 48.3% | 0.99 |
| 15 Oct 2026 | 47.8% | 0.98 |
| 14 Oct 2026 | 47.3% | 0.97 |