Union Pacific Big Boy Wallpapers

Union Pacific Big Boy Wallpapers collection on this site is in different resolutions from 640x480 and up to 1920x1200. All Union Pacific Big Boy Wallpaper are free to download. We hope you will like this section of our desktop images.

Union Pacific Big Boy - wallpapers: Big Boy was the nickname universally applied to the Union Pacific Railroad's twenty-five 4000 class 4-8-8-4 steam locomotives built between 1941 and 1944 by Alco. They are often proclaimed as the largest steam locomotives ever built, but that title is quite contro