This image is a family gathering of Native Americans posing with their traditional clothing and artifacts. The patriarch is Chief Running Horse, but the family is otherwise unidentified.
The description states simply:
HSC-14 CHIEF RUNNING HORSE AND FAMILY
–Not much more is known about this family, but the image was widely used by many publishers in the mid-20th Century. While the photographer is from Colorado, it is quite possible that this Native American family was from Arizona, where tourism was more common along Route 66.
Other versions of this image available on line have a date from the 1950s.