Lakes / Idaho / Boundary County / McArthur Lake
McArthur Lake, Idaho
135.25 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Idaho
48.51 degrees N, 116.45 degrees W - Boundary 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 McArthur Lake Stacks Up
- Larger than 64% of the 316 lakes counted in Idaho.
- The largest lake in Boundary County among those counted.
- About 60 miles from Coeur d'Alene, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Harrison Lake | Boundary | 15 mi | 28.42 acres |
| Chase Lake | Bonner | 18 mi | 135.66 acres |
| Priest Lake | Bonner | 20 mi | 23,425.59 acres |
| Smith Lake | Boundary | 20 mi | 26.93 acres |
| Gamlin Lake | Bonner | 20 mi | 163.34 acres |
| Dawson Lake | Boundary | 21 mi | 49.42 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About McArthur Lake
How Big Is McArthur Lake?
McArthur Lake covers 135.25 acres in Boundary County, Idaho.
What Is the Largest Lake in Boundary County?
McArthur Lake is the largest lake in Boundary County, at 135.25 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 59546501). Verified October 30, 2026.