One of the great army of prospectors who still pans for colors Estes Park/near Grand Lake. A prospector poses near a donkey in either Estes Park or Grand Lake, Colorado. The donkey has saddle bags and U. S. flags attached to its tack. A car is in the background. Date 1922. Source: A. W. Spring. Courtesy: Western History/Genealogy Department, Denver Public Library, Denver, Colorado (USA).