An unusual petroglyph toward the western end of Nine Mile Canyon depicts a man with extended arm and five-fingered hand leading a horse with a rider. These petroglyphs, probably from the Ute era, lack the fine detail of some of the Fremont era art at McConkie Ranch.

Nine Mile Canyon has been called “the world’s longest art gallery” with extensive and intricate images from the Fremont era (generally about 400 CE to about 1400 CE) as well as from later Native Americans (mostly Ute) and western settlers and explorers during the 19th century. People have used this canyon as a thoroughfare for some 8,000 years, and the smooth, layered sandstone cliffs lining the canyon floor are covered with many thousands of petroglyphs.