Lakes / Idaho / Owyhee County / Forster Reservoir
Forster Reservoir, Idaho
44.97 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Idaho
42.63 degrees N, 117.00 degrees W - Owyhee 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 Forster Reservoir Stacks Up
- Larger than 31% of the 316 lakes counted in Idaho.
- About 79 miles from Boise, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Dougal Reservoir | Owyhee | 2.3 mi | 75.48 acres |
| Anderson Reservoir | Owyhee | 2.9 mi | 51.15 acres |
| Star Reservoir | Owyhee | 17 mi | 36.82 acres |
| Triangle Reservoir | Owyhee | 22 mi | 72.84 acres |
| Dry Creek Reservoir | Owyhee | 33 mi | 71.66 acres |
| Twin Lakes Reservoir | Owyhee | 39 mi | 49.67 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Forster Reservoir
How Big Is Forster Reservoir?
Forster Reservoir covers 44.97 acres in Owyhee County, Idaho.
What Is the Largest Lake in Owyhee County?
C J Strike Reservoir is the largest lake in Owyhee County, at 6,207.99 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 131376257). Verified October 30, 2026.