Reservoir · California · United States · CDEC
TRINITY LAKE
66.7% full
Capacity
3,019.13 hm³
Volume stored
2015 hm³
Vs month average
139% of normal
Coordinates
40.801°N, 122.762°W
Last updated
2026-11-01
Current fill
66.7%vs 7 days ago
-0.4 pplosing
vs 1 year ago
-4.2 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs November average
139%of normal
66.7% full on 2026-11-01, against an average of 48.0% for November across 6 years of readings (+18.7 points).
Drought Monitor at this site · 27 October 2026
D0abnormally dry
The ground at TRINITY 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. California drought figures →
Data source: CDEC — California Dept of Water Resources — 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: 2026-11-01.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.801°N, 122.762°W · Open in Google Maps
About TRINITY LAKE
As of November 1, 2026, TRINITY LAKE is filled to 66.7% of its total capacity, holding 2,015 hm³ of water out of a maximum 3,019 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 (-0.4 pp), and it is 4.2 points below its level on the same date a year earlier.
Across the readings we hold for TRINITY LAKE — 1822 data points between November 3, 2021 and November 1, 2026 — the level has ranged from a low of 21.3% (December 19, 2022) to a high of 92.8% (June 3, 2025). On average the reservoir is fullest around June and at its lowest around November.
It is operated by CDEC primarily for multiple purposes. It is at 40.801°N, 122.762°W.
Key facts
- Current fill level
- 66.7% of total capacity
- Water stored
- 2,015 hm³
- Total capacity
- 3,019 hm³
- 7-day change
- ▼ 0.4 pp
- Year-on-year
- ▼ 4.2 pp
- Primary use
- Multipurpose
- Operator
- CDEC
- Coordinates
- 40.801°N, 122.762°W
- Last updated
- November 1, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 1 Nov 2026 | 66.7% | 2,015 |
| 31 Oct 2026 | 66.8% | 2,017 |
| 30 Oct 2026 | 66.8% | 2,018 |
| 29 Oct 2026 | 66.9% | 2,019 |
| 28 Oct 2026 | 66.9% | 2,021 |
| 27 Oct 2026 | 67.0% | 2,022 |
| 26 Oct 2026 | 67.0% | 2,024 |
| 25 Oct 2026 | 67.1% | 2,025 |
| 24 Oct 2026 | 67.1% | 2,026 |
| 23 Oct 2026 | 67.2% | 2,028 |
| 22 Oct 2026 | 67.2% | 2,029 |
| 21 Oct 2026 | 67.2% | 2,030 |