Big Boy Schedule 2024. 4014, the world’s largest steam locomotive, will return to the rails in 2024 for a tour celebrating the railroad’s deep history and connection to. Union pacific has released a detailed schedule for “big boy” 4014’s upcoming tour across wyoming, utah, nevada, california and idaho in july, including a public excursion.
4014 heads out again on the heartland of america tour starting on thursday, aug. Union pacific’s legendary big boy no.