Lakes / Oregon / Umatilla County
Lakes in Umatilla County, Oregon
3 lakes counted in Umatilla County - the largest is Cold Springs Reservoir at 1,440 acres.
3
Lakes Counted
1,440 acres
Largest - Cold Springs Reservoir
Umatilla County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Cold Springs Reservoir | Umatilla | 1,440 acres | - |
| 2 | McKay Reservoir | Umatilla | 1,174 acres | - |
| 3 | Langdon Lake | Umatilla | 49 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.