Horseshoe Canyon
Horseshoe Canyon contains some of the most significant rock markings in North America. The Great Gallery, the best known pictograph panel in Horseshoe Canyon, includes well-preserved, life-sized figures with intricate designs. Other impressive sights include spring wildflowers, sheer sandstone walls, and mature cottonwood groves along the intermittent stream in the canyon bottom. Horseshoe Canyon was added to Canyonlands National Park in 1971. (Taken from NPS website)
From 2000-7000 years old.