Lakes / Idaho / Camas County / Thorn Creek Reservoir
Thorn Creek Reservoir, Idaho
116.96 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Idaho
43.20 degrees N, 114.60 degrees W - Camas 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 Thorn Creek Reservoir Stacks Up
- Larger than 61% of the 316 lakes counted in Idaho.
- About 35 miles from Ketchum, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| McHan Reservoir | Camas | 4.2 mi | 32.87 acres |
| Spring Creek Reservoir | Camas | 5.2 mi | 44.73 acres |
| Summit Reservoir | Camas | 6.4 mi | 47.94 acres |
| Kelly Reservoir | Camas | 7.5 mi | 85.44 acres |
| Macon Lake | Camas | 8.6 mi | 26.23 acres |
| Mormon Reservoir | Camas | 12 mi | 1,440.32 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Thorn Creek Reservoir
How Big Is Thorn Creek Reservoir?
Thorn Creek Reservoir covers 116.96 acres in Camas County, Idaho.
What Is the Largest Lake in Camas County?
Mormon Reservoir is the largest lake in Camas County, at 1,440.32 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 59647429). Verified October 30, 2026.