Lakes / Oregon / Harney County / Guano Reservoir
Guano Reservoir, Oregon
117 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Oregon
42.53 degrees N, 119.31 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 Guano Reservoir Stacks Up
- Larger than 61% of the 642 lakes counted in Oregon.
- About 146 miles from Bend, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Rock Creek Reservoir | Harney | 11 mi | 287 acres |
| Link Lake | Lake | 12 mi | 121 acres |
| Fitzgerald Lake | Lake | 14 mi | 27 acres |
| Reservoir Lake | Lake | 15 mi | 45 acres |
| Desert Lake | Lake | 16 mi | 732 acres |
| Alger Lake | Lake | 17 mi | 991 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Guano Reservoir
How Big Is Guano Reservoir?
Guano Reservoir covers 117 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 158122595). Verified October 30, 2026.