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

The 133-foot-long locomotive is the only Big Boy to still travel the tracks.

Union Pacific will celebrate the 250th year of American independence with its first-ever coast-to-coast steam tour led by the Big Boy locomotive.

Big Boy No. 4014, described as "the Elvis Presley of locomotives," could begin its first ever coast-to-coast tour in just a matter of weeks.

For the first time ever, both coasts could receive a visit from the world's largest operating steam locomotive.

DENVER (KDVR) — The world’s largest operating 1.2 million-pound steam locomotive is coming back to Colorado. The locomotive, known as Big Boy No. 4014, is 1.2 million pounds and 132 feet long, about ...

The tour schedule for the western leg of Big Boy's historic coast-to-coast tour was announced Monday. The world's largest locomotive, which weighs ...