Cheyenne, WY

Why this stop matters

Cheyenne is the home shop of Union Pacific's heritage steam program. Number 4014 returned here in 2014 for a five-year restoration that included converting the locomotive from coal to oil firing, rebuilding the air-brake system, and replacing flues. It rolled out under its own power in 2019, in time for the 150th anniversary of the Transcontinental Railroad's completion at Promontory Summit. The Cheyenne shop floor is one of the few places in the world where Big Boy-class machinery is actively maintained.