By the late 1950s, there were just two places in the United States that still featured big-time steam operations: The Norfolk & Western in the Appalachias, and Union Pacific in Wyoming. Cheyenne was the home base for UP's fleet of 4-8-8-4 "Big Boys" and 4-6-6-4 "Challengers," with an enormous coaling tower to feed these massive beasts. An unidentified "Challenger" sits just outside of the coaling tower in October 1958, and much of the rest of the steam locomotive facility can be seen as well - including an Alco diesel switcher! (Frank "Woody" Woodburn photo, Craig Walker collection)
