Lakes / Idaho / Boise County / Ardeth Lake
Ardeth Lake, Idaho
78.55 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Idaho
43.96 degrees N, 115.01 degrees W - Boise 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 Ardeth Lake Stacks Up
- Larger than 50% of the 316 lakes counted in Idaho.
- The largest lake in Boise County among those counted.
- About 38 miles from Ketchum, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Vernon Lake | Custer | 1.1 mi | 31.41 acres |
| Edna Lake | Custer | 1.2 mi | 56.2 acres |
| Spangle Lake | Boise | 1.5 mi | 38.8 acres |
| Toxaway Lake | Custer | 2.2 mi | 121.58 acres |
| Imogene Lake | Custer | 3.7 mi | 71.66 acres |
| Alice Lake | Blaine | 3.9 mi | 71.17 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Ardeth Lake
How Big Is Ardeth Lake?
Ardeth Lake covers 78.55 acres in Boise County, Idaho.
What Is the Largest Lake in Boise County?
Ardeth Lake is the largest lake in Boise County, at 78.55 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 43838343). Verified October 30, 2026.