Big Boy Steam Engine

Address: 17th at Morrie Ave.
In Holliday Park
Cheyenne, WY 82001
Phone: (307) 637-6423
Email: Send Email
Website: Visit Website


Even in retirement, Old Number 4004 remains an imposing sight.  The world's largest steam locomotive, this powerful coal-fired engine was designed to pull a 3600-ton train over steep grades between Cheyenne, WY and Ogden, Utah.  The 4004 is one of the eight remaining Big Boys on display throughout the country.

On display year-round in Holliday Park. The engine is in the southeast corner of the park. You can park your car in the lot accessible from East 17th Street and Morrie Avenue.


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