Lakes / Idaho / Elmore County / Blair Trail Reservoir
Blair Trail Reservoir, Idaho
177.67 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Idaho
43.06 degrees N, 115.31 degrees W - Elmore 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 Blair Trail Reservoir Stacks Up
- Larger than 69% of the 316 lakes counted in Idaho.
- About 55 miles from Twin Falls, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Morrow Reservoir | Elmore | 3.8 mi | 43 acres |
| Upper Teapot Reservoir | Elmore | 8.9 mi | 46.54 acres |
| Lower Teapot Reservoir | Elmore | 9.1 mi | 64.25 acres |
| Pioneer Reservoir | Gooding | 14 mi | 204.36 acres |
| Bliss Reservoir | Gooding | 17 mi | 286.59 acres |
| Little Camas Reservoir | Elmore | 20 mi | 1,048.34 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Blair Trail Reservoir
How Big Is Blair Trail Reservoir?
Blair Trail Reservoir covers 177.67 acres in Elmore County, Idaho.
What Is the Largest Lake in Elmore County?
Anderson Ranch Reservoir is the largest lake in Elmore County, at 4,515.55 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 53240554). Verified October 30, 2026.