Lakes / Idaho / Owyhee County / Triangle Reservoir
Triangle Reservoir, Idaho
72.84 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Idaho
42.78 degrees N, 116.61 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 Triangle Reservoir Stacks Up
- Larger than 48% of the 316 lakes counted in Idaho.
- About 61 miles from Boise, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Anderson Reservoir | Owyhee | 20 mi | 51.15 acres |
| Twin Lakes Reservoir | Owyhee | 20 mi | 49.67 acres |
| Dry Creek Reservoir | Owyhee | 21 mi | 71.66 acres |
| Twin Lakes | Owyhee | 21 mi | 25.95 acres |
| Dougal Reservoir | Owyhee | 21 mi | 75.48 acres |
| O X Lake | Owyhee | 22 mi | 34.84 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Triangle Reservoir
How Big Is Triangle Reservoir?
Triangle Reservoir covers 72.84 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 137314833). Verified October 30, 2026.