Winchester Lake
| Winchester Lake | |
|---|---|
| Location | Lewis County, Idaho, United States |
| Coordinates | 46°14′05″N 116°37′13″W / 46.2346268°N 116.6203348°W |
| Type | Reservoir |
| Primary inflows | Lapwai Creek |
| Primary outflows | Lapwai Creek to Clearwater River |
| Catchment area | 7,800 acres (3,200 ha) |
| Basin countries | United States |
| Managing agency | Idaho Department of Parks and Recreation |
| Built | 1910 |
| Max. length | 5,085 feet (1,550 m) |
| Max. width | 3,106 feet (947 m) |
| Surface area | 103.1 acres (41.7 ha) |
| Average depth | 23 feet (7.0 m) |
| Max. depth | 35 feet (11 m) |
| Water volume | 1,960 acre-feet (2,420,000 m3) |
| Residence time | 1.95 years |
| Surface elevation | 3,904 feet (1,190 m) |
| Settlements | Winchester |
Winchester Lake (also known as Lapwai Lake) is a man-made body of water located on the south side of Winchester in Lewis County, Idaho. It is the central feature of Winchester Lake State Park. The lake covers 100 acres (40 ha), has an average depth of 23 feet (7.0 m), and is 35 feet (11 m) deep at its deepest point.