Lakes / Oregon / Union County / La Grande Reservoir
La Grande Reservoir, Oregon
33 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Oregon
45.14 degrees N, 118.20 degrees W - Union County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How La Grande Reservoir Stacks Up
- Larger than 16% of the 642 lakes counted in Oregon.
- About 170 miles from Bend, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Pilcher Creek Reservoir | Union | 9.0 mi | 218 acres |
| Wolf Creek Reservoir | Union | 10 mi | 195 acres |
| Shaw Reservoir | Union | 11 mi | 47 acres |
| Morgan Lake | Union | 12 mi | 60 acres |
| Conley Lake | Union | 21 mi | 120 acres |
| Thief Valley Reservoir | Union | 21 mi | 751 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About La Grande Reservoir
How Big Is La Grande Reservoir?
La Grande Reservoir covers 33 acres in Union County, Oregon.
What Is the Largest Lake in Union County?
Thief Valley Reservoir is the largest lake in Union County, at 751 acres.
Largest Lakes in Oregon
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Upper Klamath Lake | Klamath | 62,095 acres | - |
| 2 | Lake Umatilla | Morrow | 50,042 acres | - |
| 3 | Lake Abert | Lake | 37,137 acres | - |
| 4 | Summer Lake | Lake | 31,602 acres | - |
| 5 | Harney Lake | Harney | 31,290 acres | - |
All 642 Oregon lakes ranked by surface area
Sources: USGS NHD (The National Map NHD MapServer layer 12) named waterbodies FTYPE 390/436; counties via Census point-in-polygon lake data (ID 109338911). Verified October 30, 2026.