Union Pacific Big Boy Train Schedule 2025. Union pacific's heartland of america tour that starts august 29 in cheyenne, wyoming will see its legendary steam locomotive big boy no. Aug 14, 2025 / 11:56 am cdt.

4014 will tour the midwest fall 2025 including stops in illinois, missouri, and arkansas. 4014, the world’s largest steam locomotive, will return to the rails in 2025 for a tour celebrating the railroad’s deep history and connection to.