Big Boy 2024 Tour. 4014 is one of 25 built in the 1940s to handle the. Union pacific’s famed “big boy” number 4014 had the first half of its summer 2024 excursion tour announced today!
4014, the world’s largest steam locomotive, will return to the rails this summer with a scenic tour across mountain. The famed engine will continue its summer tour schedule through nebraska, iowa, illinois, missouri, ar.