Lake Eleanor water level
▼ 1.4 points from 68.3% a year ago
Source: waterdata.usgs.gov/monitoring-location/USGS-11277500, accessed October 1, 2026. Updated every 6 hours.
Lake Eleanor is at 68% of full pool (4657.42 ft) as of September 29, 2026. Lake Eleanor was last full on June 25, 2026 (98.3% of normal storage). Lake Eleanor is near Groveland, California. Check current swimming advisories at Yosemite current conditions (National Park Service) before you go.
Lake Eleanor 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: USGS daily data.
Storage, % of full pool, since 1918
Lake Eleanor is falling: 69% full, down 1.2 percentage points since September 27, 2026.
On this same date last year (September 28, 2025), Lake Eleanor was 68.3% full, 0.7 percentage points lower 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).
Lake Eleanor map
Lake Eleanor is at 37.9741, -119.8810. Open in OpenStreetMap.
The dam
- Hydropower
- Water supply
Sources: nid.sec.usace.army.mil, accessed September 29, 2026
Visiting Lake Eleanor
Good to know:
- Sister storage to Hetch Hetchy under the Raker Act era San Francisco water system. Public visitor facilities are minimal compared with Hetch Hetchy; treat access as wilderness/road-dependent and confirm with NPS before travel.
- No separate visitor fee schedule verified for Eleanor itself this pass; Yosemite entrance rules apply where the access is inside the park.
Swimming
Water-quality and swimming advisories change without notice. Always check Yosemite current conditions (National Park Service) before you go.
Sources: nps.gov/yose/planyourvisit/conditions.htm, accessed September 28, 2026
On the water
No campgrounds, boat ramps, or swim spots linked to Lake Eleanor yet.
Common questions
- Lake Eleanor is at 68% of full pool (4657.42 ft) as of September 29, 2026.
- Lake Eleanor was last full on June 25, 2026, when it held 98.3% of its normal storage. 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 USGS daily data since October 9, 1918.
- In USGS daily data since October 9, 1918, Lake Eleanor's highest storage was 110.3% of normal storage on January 1, 1997. Its lowest after it first filled (May 24, 1919) was 0% of normal storage on October 2, 1956. These are the highest and lowest daily readings in the published data, not official records.
- Lake Eleanor is near Groveland, California (37.9741, -119.8810).
- Local Government operates the dam at Lake Eleanor.
- Lake Eleanor's dam is used for Hydropower, Water supply.
- Lake Eleanor has no designated swim area on record. Check current advisories at Yosemite current conditions (National Park Service) before you go.