It is big. And loud. Furthermore, it belches steam. "It's the smell," says railroad fanatic Sam Sargent about a 1940s train engine known as the Union Pacific Big Boy, the largest, heaviest and most ...

Cheyenne-based Big Boy 4014, the world's largest operating steam locomotive, will make its first ever coast-to-coast tour ...

DENVER (KDVR) — One of the world’s largest locomotives passed through Colorado in October, operating much like it did when it was first built in the mid-1900s. The train, known as Big Boy No. 4014, ...

The world’s largest operating steam locomotive is being readied for a spectacle that will stretch from ocean to ocean in 2026 ...

One of the world’s biggest and most powerful steam locomotives is chugging to its big debut after five years of restoration work. Big Boy No. 4014 rolled out of a Union Pacific restoration shop in ...

Add Yahoo as a preferred source to see more of our stories on Google. Union Pacific’s historic steam locomotive Big Boy No. 4014 prepares to leave Evanston, Wyoming, for Ogden on May 8, 2019. The ...

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This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. DENVER (KDVR) — One of the world’s largest ...