UP Big Boys 4004 4005 4006 4014 (The return) 4017 4018 4023

Union Pacific Big Boys from Green Bay to Frisco, from St Louis to Ogden. Just the Big Boys from our Spike 150 trip: 4004, 4005, 4006, 4014, 4017, 4018, and 4023. The missing Big Boy is 4012 in Steamtown, Pa. A longer video of our trip is also available.