The Snake River Archeological District, listed on the National Register of Historic Places in 1976, is a highly significant cultural resource area spanning the rugged canyon lands of the Snake River in Asotin County, Washington, and extending into neighboring Idaho. This expansive district encompasses a dense concentration of archaeological sites that document over 10,000 years of continuous human occupation, primarily associated with the ancestral Nez Perce (Nimiipuu) people and their predecessors. The river corridor served as a vital economic, social, and spiritual artery, and the district's preserved sites-including semi-subterranean housepit villages, seasonal fishing camps, tool manufacturing workshops, and resource processing areas-offer an unparalleled record of how indigenous populations successfully adapted to the diverse riverine and upland environments of the Columbia Plateau.

Beyond its domestic and utilitarian sites, the district is highly regarded for its rich spiritual and artistic legacy, highlighted by numerous rock art panels featuring both petroglyphs and pictographs carved and painted onto the basalt canyon walls. These sacred sites, alongside sensitive burial grounds, underscore the deep, enduring cultural and spiritual connection of the Nez Perce Tribe to this landscape. As one of the most archaeologically diverse and well-preserved river canyon districts in the Pacific Northwest, the Snake River Archeological District continues to yield invaluable scientific data regarding prehistoric settlement patterns, technological innovations, trade networks, and long-term environmental changes in the region.