The Sanpoil (Nesilextcin, N'Puchle), including the Nespelem and the Colville (Skoylpeli, Kettle Falls Indians), lived in northwestern Washington along the Columbia River from Kettle Falls to the vicinity of Grand Coulee and north of the Columbia in the Sanpoil and Nespelem River basins. They now live on the Colville Indian Reservation with the Colville and other Plateau groups in Washington. They speak an Interior Salish language and probably number about one thousand.
Chance, David H. (1973). Balancing the Fur Trade at Fort Colville. Record of Washington State University, no. 34. Pullman.
Ray, Verne F. (1954). The Sanpoil and Nespelem: Salishan Tribes of Northeastern Washington. New Haven: Human Relations Area Files.