Twenty-five Big Boys were commissioned exclusively for Union Pacific Railroad, the first of which was delivered in 1941. These massive locomotives were built to haul heavy equipmen

The Union Pacific Big Boy is a type of simple articulated 4-8-8-4 steam locomotive manufactured by the American Locomotive Company (ALCO) in Schenectady New York between 1941 and 1

Union Pacific's famed Big Boy No. 4014, the world's largest operating steam locomotive, will journey to the East Coast this summer for the first time as part of a historic coast-to

Union Pacific 4014 is a preserved 4884-1 class 4-8-8-4 "Big Boy" type steam locomotive owned and operated by the Union Pacific (UP) as part of its heritage fleet.

Apr 28, 2026 · Union Pacific Railroad has officially announced the long-anticipated eastern leg of its 2026 “Coast-to-Coast Tour” featuring the legendary Union Pacific 4014, t

Feb 26, 2026 · The Big Boy train is the largest and most powerful steam engine in the world, and it will soon cross the United States. Here’s where you’ll be able to see it.

Apr 28, 2026 · Union Pacific's Big Boy No. 4014, the world's largest operating steam locomotive. This is the first time Big Boy has steamed across the Mississippi River and into t

Feb 25, 2026 · Originally built during World War II to haul heavy freight over the Wasatch Mountains, Big Boy locomotives are icons of American railroading. Of the 25 constructed,

Feb 24, 2026 · Twenty‑five Big Boy locomotives were originally built for Union Pacific to haul heavy freight over Utah’s Wasatch Range during World War II. While eight were pr

Apr 29, 2026 · Delivered to Union Pacific in 1941, the locomotive was among 25 built to haul wartime freight across the Continental Divide in Wyoming and Utah. Big Boy is the last