Union Pacific “Big Boy” 4014 is the largest operating steam locomotive in the world and one of the biggest ever built. The locomotive is seen here in July of 2024 on a publicity tour for the Union Pacific Railroad. Union Pacific Railroad #trains #steamtrain #bigboy #bigboy4014 #trainspotting #unionpacific | Coasterfan2105

Union Pacific’s legendary Big Boy #UP4014 is rumbling through the heartland and visiting Iowa this week. 🌽 The world’s largest steam locomotive rolls through the state with whistle-stops in: September 4: Carroll September 5: Belle Plaine September 6: Grand Mound and Sterling, Ill. 📅 Check out the full schedule at UPsteam.com. We look forward to seeing you - 25 feet back! #BigBoyHeartland #UnionPacific #BigBoy4014 | Union Pacific Railroad

As Big Boy #up4014 begins its Westward Bound Tour, Union Pacific reminds onlookers of the size, mechanics and history that make the Big Boy so special. #bigboyheadswest | Union Pacific Railroad

How did the 4000 class steamer on Union Pacific get the Big Boy name? It started with one employee at the ALCo plant. From the documentary "Big Boy Collection" On sale, $10.00 off! https://rfd.video/BigBoyCollection | Railfan Depot

UP's Big Boy pulling in Cheyenne sometime in the late 1950s. From the Pentrex program "Union Pacific Big Boy Collection" which has every Big Boy to hit the rails! http://rfd.video/BigBoyCollection | Railfan Depot

Witnessing the legendary Union Pacific Big Boy 4014 up close. | Union Pacific Big Boy Heritage Shop