Union Pacific's steam locomotive #3985 is the largest operating steam locomotive in the world. This 4-6-6-4 locomotive, built in 1943 still runs today as part of the railroad's public relations ...
CHEYENNE – The Union Pacific steam crew has been busy preparing the Challenger No. 3985, along with the TTT-6 steam locomotive No. 5511 and Centennial diesel locomotive No. 6936, for delivery to the ...
Streaming platforms for America's Steam Trains: Challenger 3985 - The Worlds Largest Operating Steam Locomotive haven’t been announced yet. Check back soon for updates on where you can watch it online ...