Big Boy 2024 Tour. 4014, the world’s largest operating steam locomotive, will travel during the heartland of. 4014, the world’s largest steam locomotive, will return to the rails this summer with a scenic tour across mountain ranges and high desert vistas in four.

Union pacific’s famed “big boy” number 4014 had the first half of its summer 2024 excursion tour announced today! 4014 is set to resume its heartland of america tour on friday, oct.