The Nez Perce Snake River Archaeological District is a 3,500-acre (1,400 ha) archaeological district located in Nez Perce County, Idaho, and Asotin County, Washington, and centered on the Snake River, which divides the two states. The district includes a number of sites inhabited by the Nez Perce people, who used the area as a fishing ground and a winter campsite. Settlement in the district stretches from roughly 6000 B.C. to the 20th century A.D. Several hundred pictographs are part of the district, usually painted at village sites.