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Union Pacific 3985 & Full Throttle Steve Lee, UP Engineer
Union Pacific #844, Challenger #3985, and Big Boy #4014 tackle the renowned Wasatch Summit.
UP Challenger 3985 pulls RBBB circus train through Ault, CO
Trainz 2019 Union Pacific 3985 Challenger Evolution Historical Footage. (Reupload)
The Challenger on Sherman Hill - English • Great Railways
The FORMER Largest Operational Steam Locomotive | UP 3985 Challenger | History in the Dark
Discovery of a very rare CHALLENGER 3985 Locomotive LGB Gartenbahn Coal fired Walter Kolb
UP 3985 from static display to the path to restoration in Challenger ‘82 Union Pacific’s 3985.
Union Pacific Challenger #3985
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Last Updated: August 25, 2026
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