Named after Buffalo Rock, which projects from the scarred cliffs of the eastern canyon wall. On the Washington side are pictographs on the low rocks near the river’s side. Most of the drawings represent men, with huge, square shoulders, short legs, and horned headdresses; others resemble mountain goats, deer, and elk. According to an explanation advanced by the Smithsonian Institution, these pictographs were made by the Basket Maker Indians some 3,000 years ago. The area is within Nez Perce National Historical Park.