Union Pacific Railroad’s “Challenger” No. 3985, the world’s largest operating steam locomotive, will stop in Shakopee as part of a five-state, 1,750-mile tour from Cheyenne, Wyo., to ...

including two from Union Pacific: 4-6-6-4 No. 3985 and Big Boy 4-8-8-4 No. 4014. To find articulated steam locomotives that still operate, check out the Great American Steam Locomotives ...

Union Pacifics steam locomotive 3985 is the largest operating steam locomotive in the world This 4664 locomotive built in 1943 still runs today as part of the railroads public relations program In ...