Trinity Lake water level
▼ 6.4 points from 75.3% a year ago
Source: data.usbr.gov/rise/api/catalog-item/10853, accessed October 1, 2026. Updated every 6 hours.
Trinity Lake is at 69% of full pool (2318.2 ft) as of September 28, 2026. Trinity Lake was last full on June 27, 2019 (95.1% of normal storage). Trinity Lake is near Weaverville, California. It has restrooms, drinking water, picnic area, boat launch, and marina, managed by USDA Forest Service - Shasta-Trinity National Forest. Check current swimming advisories at Trinity Lake current conditions (USDA Forest Service) before you go.
Trinity Lake level history
This site counts a reservoir as full on a day its storage is at or above 95% of the dam's normal storage (National Inventory of Dams). Many reservoirs rarely reach 100%, even in wet years, because operators release water for irrigation, power or flood control before they fill, so this site treats 95% as full. Highs and lows are daily readings in the published data, not official records. Source: Bureau of Reclamation daily data.
Storage, % of full pool, since 1962
Trinity Lake is falling: 69% full, down 0.4 percentage points since September 27, 2026.
On this same date last year (September 28, 2025), Trinity Lake was 75.3% full, 6.3 percentage points higher than today's 69%.
Weekly averages of the source's daily readings; older years may be monthly or sparser where that is all the source published. Download the charted data (JSON).
Trinity Lake map
Trinity Lake is at 40.8011, -122.7622. Open in OpenStreetMap.
The dam
- Hydropower
- Irrigation
- Recreation
Sources: nid.sec.usace.army.mil, accessed September 29, 2026 , recreation.gov/camping/gateways/32, accessed September 29, 2026
Data source: Recreation.gov
Visiting Trinity Lake (Whiskeytown-Shasta-Trinity National Recreation Area)
- Restrooms
- Drinking water
- Picnic area
- Boat launch
- Marina
Developed campgrounds around Trinity Lake (including Bushytail near Minersville) reserve via Recreation.gov; concessionaire-managed. When full, Trinity Lake has about 145 miles of shoreline and about 17,000 surface acres.
In developed recreation sites dogs must be on a leash 6 feet or shorter (Forest Service developed-site rule).
Good to know:
- Boating, water skiing, sailing, swimming, and fishing are primary lake uses; Clark Springs public boat ramp is near Bushytail Campground.
- Part of the Whiskeytown-Shasta-Trinity National Recreation Area; Trinity Alps Wilderness is adjacent for trail access.
Sources (3) ▾
fs.usda.gov/r05/shasta-trinity/recreation/trinity-lake, accessed September 28, 2026 , fs.usda.gov/r05/shasta-trinity/recreation/bushytail-campground, accessed September 28, 2026 , fs.usda.gov/r05/shasta-trinity/recreation/trinity-lake-trinity-river-and-trinity-alps-wilderness, accessed September 28, 2026
Swimming
Water-quality and swimming advisories change without notice. Always check Trinity Lake current conditions (USDA Forest Service) before you go.
Sources: fs.usda.gov/r05/shasta-trinity/recreation/trinity-lake, accessed September 28, 2026
On the water
No campgrounds, boat ramps, or swim spots linked to Trinity Lake yet.
Common questions
- Trinity Lake is at 69% of full pool (2318.2 ft) as of September 28, 2026.
- Trinity Lake was last full on June 27, 2019, when it held 95.1% of its normal storage (elevation 2,362.51 ft). This site counts a reservoir as full on a day its storage is at or above 95% of the dam's normal storage (National Inventory of Dams). Many reservoirs rarely reach 100%, even in wet years, because operators release water for irrigation, power or flood control before they fill, so this site treats 95% as full. Based on Bureau of Reclamation daily data since November 1, 1962.
- In Bureau of Reclamation daily data since November 1, 1962, Trinity Lake's highest elevation was 2,378.34 ft on January 19, 1974. Its lowest after it first filled (February 7, 1963) was 2,120.2 ft on November 9, 1977. These are the highest and lowest daily readings in the published data, not official records.
- Trinity Lake is near Weaverville, California (40.8011, -122.7622).
- Bureau of Reclamation operates the dam at Trinity Lake.
- Trinity Lake's dam is used for Hydropower, Irrigation, Recreation.
- Fees: Developed campground single site (e.g. Bushytail) $30/night, Single site with electric hookup (Bushytail) $38/night, Day use (Bushytail area) $12/vehicle/day, Boat ramp parking/launch (Clark Springs area) $12, Extra vehicle $12/night.
- Weaverville Ranger Station, Monday-Friday, 8:30 a.m.-1:00 p.m. and 1:45-4:30 p.m.; closed weekends and federal holidays.
- Trinity Lake has no designated swim area on record. Check current advisories at Trinity Lake current conditions (USDA Forest Service) before you go.