In the Yellowstone caldera area there is a legend of a group of Native Americans who lived high in the Rocky Mountains. This tribe was short in stature and were actually considered to be a pygmy people. They eschewed the use of horses and instead used dogs to transport products and carry food. They were gone a long time ago and the only remnant of them is some of the dwellings they left, such as sheep enclosures and conical timber lodges made by them. They, like so many tribes of native peoples, have gone the way of the dinosaurs, leaving no trace of their passing except for their dwellings. Curious.