Lakes / Oregon / Harney County / Cottonwood Reservoir
Cottonwood Reservoir, Harney County, Oregon
79 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Oregon
43.93 degrees N, 118.30 degrees W - Harney 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 Cottonwood Reservoir Stacks Up
- Larger than 51% of the 642 lakes counted in Oregon.
- About 150 miles from Bend, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Stallard Reservoir | Harney | 5.1 mi | 43 acres |
| Beulah Reservoir | Malheur | 7.2 mi | 1,844 acres |
| Murphy Reservoir | Malheur | 11 mi | 30 acres |
| Griffin Creek Reservoir | Harney | 12 mi | 38 acres |
| North Beede Reservoir | Harney | 15 mi | 73 acres |
| South Beede Reservoir | Harney | 16 mi | 131 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Cottonwood Reservoir
How Big Is Cottonwood Reservoir?
Cottonwood Reservoir covers 79 acres in Harney County, Oregon.
What Is the Largest Lake in Harney County?
Harney Lake is the largest lake in Harney County, at 31,290 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 162986146). Verified October 30, 2026.