The Fremont Peoples (700-1300 AD) were hunter gatherers who lived along the Fremont River in Colorado, Utah, Nevada, Idaho in pit houses with brush roofs. The Fremont were very talented Rock artists. Photo by Paula R.
Image Taken Dinosaur National Monument Colorado
https://en.wikipedia.org/wiki/Fremont_culture
https://www.nps.gov/dino/index.htm