The world's largest operating steam train is in Denver. Union Pacific's legendary Big Boy No. 4014 locomotive made a pit stop ...

Big Boy No. 4014 made its way to Denver Thursday, where it wasn't available for public viewing but where Airtracker7 was able ...

"Big Boy," a 1.2 million-pound locomotive, is back in Colorado after being restored to the world’s largest operating steam ...

The world's largest steam locomotive chugged through Colorado Thursday as part of its limited summer tour. Here are some of ...

GREELEY, Colo. — Union Pacific’s Big Boy began its only scheduled trip of 2025 today (July 17), heading from its home base in ...

DENVER — “Big Boy,” one of the world’s largest trains, is taking off on Wednesday and plans to stop in three Colorado locations while on tour. Earlier this summer, ...

Union Pacific's Big Boy No. 4014 will depart from Denver Union Station back to the locomotive's home base in Cheyenne, ending the locomotive's "Heartland of America Tour." ...

OMAHA, Neb., May 27, 2025--Union Pacific Railroad announced today its legendary steam locomotive, Big Boy No. 4014, will make two whistle-stops in Greeley, Colorado, this summer as part of a ...