Colors shown: natural birch, metallic blue water. Customized with red heart at special location.
Just west of the Columbia River, south of Kettle Falls is the town of Inchelium. The Twin Lakes Reservoir lies there at coordinates 48°15′44″N 118°21′32″W, on the east side of North and South Twin Lakes. The lakes' outlet is Cornstalk Creek, which leaves the north end of North Twin Lake and flows east to the Columbia River at Inchelium. Bridge Creek Road leads east 8 miles from North Twin Lake to Incehlium and west across Gold Mountain Ridge to Washington State Route 21 in the Sanpoil River Valley.
The lake covers a total area of 4.2 square miles.