Lakes / Idaho / Valley County / Boulder Lake
Boulder Lake, Idaho
90.81 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Idaho
44.87 degrees N, 115.94 degrees W - Valley 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 Boulder Lake Stacks Up
- Larger than 55% of the 316 lakes counted in Idaho.
- About 88 miles from Boise, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Boulder Meadows Reservoir | Valley | 1.2 mi | 32 acres |
| Browns Pond | Valley | 3.5 mi | 82.42 acres |
| Upper Jug Creek Reservoir | Valley | 3.6 mi | 68.74 acres |
| Buckhorn Lake | Valley | 4.5 mi | 30.39 acres |
| Cruickshank Reservoir | Valley | 4.7 mi | 113.96 acres |
| Little Payette Lake | Valley | 5.7 mi | 1,460.92 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Boulder Lake
How Big Is Boulder Lake?
Boulder Lake covers 90.81 acres in Valley County, Idaho.
What Is the Largest Lake in Valley County?
Lake Cascade is the largest lake in Valley County, at 25,043.4 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 42401101). Verified October 30, 2026.