Also called Colville Lake, is a favorite recreation spot for the residents of Sprague and Ritzville. About six miles in length, partially obscured by growths of willow and cotton-wood, it offers good fishing for bass, perch, and crappie and, when winters are sufficiently cold, provides excellent skating.
It is an enlargement of Cow Creek. The Native American name was Silkatkwu. In a 1954, the present name was approved.