The world's largest steam engine will be making whistle stops across the United States during two tours planned for summer and fall. The fall tour begins Thursday, Aug. 29, and will travel from Cheyenne to nine states: Colorado, Arkansas, Illinois, Iowa, Kansas, Missouri, Nebraska, Oklahoma and Texas. Details at the link in our bio. #unionpacific #bigboy #bigboy4014 #cheyennedepot #cheyenne