A heartfelt thank you to everyone who stopped to see Union Pacific's legendary Big Boy No. 4014, the world’s largest operating steam locomotive, on its incredible Westward Bound tour! Your enthusiasm and support made this journey across five states truly special. Stay tuned for more information about the Heartland of America tour on UPsteam.com. #BigBoyHeadsWest #UnionPacific #SteamLocomotive #UP4014