Lakes / Idaho / Blaine County / Alturas Lake
Alturas Lake, Idaho
837.69 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Idaho
43.91 degrees N, 114.86 degrees W - Blaine 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 Alturas Lake Stacks Up
- Larger than 86% of the 316 lakes counted in Idaho.
- About 30 miles from Ketchum, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Perkins Lake | Blaine | 1.5 mi | 49.8 acres |
| Alice Lake | Blaine | 4.5 mi | 71.17 acres |
| Pettit Lake | Blaine | 4.6 mi | 398.35 acres |
| Farley Lake | Custer | 5.7 mi | 32.15 acres |
| Yellow Belly Lake | Custer | 6.1 mi | 193.48 acres |
| Toxaway Lake | Custer | 6.3 mi | 121.58 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Alturas Lake
How Big Is Alturas Lake?
Alturas Lake covers 837.69 acres in Blaine County, Idaho.
What Is the Largest Lake in Blaine County?
Magic Reservoir is the largest lake in Blaine County, at 3,078.58 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 39265514). Verified October 30, 2026.