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

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

Union Pacific's Big Boy No. 4014 locomotive train visits and whistle stops at Greeley, Denver, Cheyenne for limited summer 2025 tour with No. 1616 Locomotive.

Union Pacific’s (UP) Big Boy 4014, the world’s largest operating steam locomotive, will make two whistle-stops in Greeley, Colo., this summer as part of a limited summer excursion.

OMAHA, Neb.--(BUSINESS WIRE)-- 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 ...

Union Pacific Railroad announced today its legendary steam locomotive, Big Boy No. 4014, will make two whistle-stops in Greeley, Colorado, this summer as par ...

The legendary locomotive will be accompanied by Union Pacific’s New No. 1616 Lincoln Locomotive Union Pacific Railroad announced today its legendary steam locomotive, Big Boy No. 4014, will make ...

Union Pacific Railroad ended its eight-week Big Boy No. 4014 “Heartland of America” tour recently, and Ed Dickens and the Steam Team are looking full speed ahead to future tours.

CHEYENNE — Union Pacific Railroad ended its eight-week Big Boy No. 4014 “Heartland of America” tour a little over a month ago, and Ed Dickens and the Steam Team are looking full-speed ahead ...

But Union Pacific got its money’s worth, because the Big Boy series continued to operate regularly for the next 20 years. During their reign, the Big Boy locomotives were cargo-hauling legends, with ...

The Union Pacific Big Boy No. 4014 set out on a Heartland of America Tour towards the end of August, which included an overnight stop in Boone and a route through Ames on Sept. 5. The eight-week tour ...