"Last of the Giants" Tour

Front view of the Union Pacific Big Boy steam locomotive showing the black pilot (cowcatcher) and grey smokebox.
Union Pacific 4012, a "Big Boy" locomotive, is one of 25 built in the early 1940s by American Locomotive Company (ALCO).  You can learn more about this true giant of the rails on the "Last of the Giants" tour.

NPS Photo, Ken Ganz

Join a Park Ranger or a Volunteer on a short walk to learn more about one of the heaviest steam locomotives ever built, Union Pacific "Big Boy" #4012! This 600-ton locomotive was engineered and built in 1941, primarily for use in the mountains of Wyoming and Utah (Weather-permitting - this is an outdoor program.)

(TOUR NOTE: This is NOT a locomotive cab tour! For safety reasons, visitor accessible equipment is located in the Museum Core Complex.)

Departs from the Visitor Center. Included in the Park Entrance Fee.

Click for more about the world's largest reciprocating steam locomotive.

Last updated: December 6, 2016

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