Big Boy 2024. 4014, the world’s largest steam locomotive, will return to the rails this summer with a scenic tour across mountain. 4014, is returning to the rails in 2024, and railroad fans and curious onlookers in texas will have a chance to see.

4014 on a “four corners” tour of its system in 2024, the railroad announced today, including stops in. Union pacific announced that its legendary steam locomotive big boy no.