Lakes / Idaho / Washington County / Hornet Reservoir
Hornet Reservoir, Idaho
31.52 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Idaho
44.80 degrees N, 116.73 degrees W - Washington 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 Hornet Reservoir Stacks Up
- Larger than 13% of the 316 lakes counted in Idaho.
- About 86 miles from Boise, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lost Valley Reservoir | Adams | 18 mi | 726 acres |
| Brownlee Reservoir | Washington | 24 mi | 12,535.1 acres |
| Ben Ross Reservoir | Adams | 24 mi | 340.02 acres |
| Fairchild Reservoir | Washington | 24 mi | 96.62 acres |
| Hait Reservoir | Valley | 28 mi | 67.97 acres |
| Black Lake | Adams | 28 mi | 25.7 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Hornet Reservoir
How Big Is Hornet Reservoir?
Hornet Reservoir covers 31.52 acres in Washington County, Idaho.
What Is the Largest Lake in Washington County?
Brownlee Reservoir is the largest lake in Washington County, at 12,535.1 acres.
Largest Lakes in Idaho
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Pend Oreille | Bonner | 92,764.44 acres | - |
| 2 | American Falls Reservoir | Power | 55,319.78 acres | - |
| 3 | Coeur d'Alene Lake | Kootenai | 26,891.64 acres | - |
| 4 | Lake Cascade | Valley | 25,043.4 acres | - |
| 5 | Priest Lake | Bonner | 23,425.59 acres | - |
All 316 Idaho lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 38103726). Verified October 30, 2026.