Union Pacific's Big Boy No. 4014 is the world’s largest operating steam locomotive. It will travel through 14 states this year, making stops for spectators along the way.

Train technicians perform maintenance on Union Pacific’s Big Boy in Kansas City on Tuesday, Oct. 15, 2024. Train drivers operate the Union Pacific’s Big Boy as it rolls into Kansas City on ...

HEARNE, Texas (KBTX) - Union Pacific’s Big Boy No. 4014 train is in the Brazos Valley as part of its “Heartland of America Tour.” The massive steam locomotive arrived in Hearne Thursday ...

Gabby Leclair exclaims “I see it” as she uses her pretend binoculars to see Union Pacific’s No. 4014 “Big Boy” atop her dad’s shoulders as it steams toward Hempstead, Friday, Oct. 4, 2024.

Engineers operate the Union Pacific’s Big Boy as it rolls into Kansas City on Tuesday, Oct. 15, 2024. The 1.2 million-pound locomotive first put into operation in 1941 is one of 25 ever built ...

Train enthusiasts wait in West Weber for the Union Pacific Big Boy No. 4014, the largest steam engine built, as it chugs across the rail causeway heading east toward Ogden on Friday, July 19, 2024.

Train enthusiasts in northern Illinois will soon get the chance to see an iconic steam engine as it makes its way across the country on a national tour. The Union Pacific Big Boy No. 4014 launched ...