Big Boy No. 4014 was one of 25 locomotives built during World War II. According to Union Pacific Railroad, they were 132 feet long, weighed 1.2 million pounds and were over half the length of a ...

DENVER (KDVR) — The world’s largest operating steam locomotive, known as Big Boy No. 4014, is coming back to Colorado — and this time, it’s bringing a friend. Union Pacific, a railroad ...

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.

The Union Pacific steam locomotive No. 4014, pictured here in Cheyenne, Wyo., in May, is set to pass through Racine County on Friday as part of a Midwestern tour in celebration of the 150th ...

Big Boy No. 4014 was one of 25 locomotives built during World War II. According to Union Pacific Railroad, they were 132 feet long, weighed 1.2 million pounds and were over half the length of a ...