According to a press release, 25 Big Boys were built during World War II, but only 8 survived. No. 4014 is the only one still in operation and remains the world’s largest operating steam locomotive.

Union Pacific No. 4014, better known as "Big Boy," will start its 2024 tour on Aug. 28 in Cheyenne, Wyoming, and will work its way across nine states, including Oklahoma in October.

That said, it's still impressive that the Big Boy 4014, a locomotive delivered by Union Pacific Railroad in December of 1941, still holds distinction in the Guinness Book of World Records for the ...

"It was big and just huge," Levi Roach said. After a long day of anticipation, the iconic " Big Boy " steam engine train rolled into Big Sandy.

CHEYENNE, Wyo. — Big Boy No. 4014 kicked off its Heartland of America Tour on Wednesday that will bring the world's largest steam engine to Colorado for two whistle stops this fall.

The 'Big Boy' Steam engine blows off some steam in Columbus on Friday. Theodore Cooney-Bordy,6, left, and Ian Drummond, 6, pose for a photo as the 'Big Boy' Steam Engine pulls into Columbus.