The 4-6-6-4 Challenger Steam locomotive, Steam trains photography, Locomotive

Trix Returns with 4-6-6-4 Challenger in HO Scale - Model Railroad News

Locomotive #3985 – Challenger Railroading Heritage of Midwest America

Athearn ATH25741 N 4-6-6-4 Challenger, Tsunami2 DCC Sound, Union Pacific #3985 Modern

America's Steam Trains-Challenger 3985-The Worlds Largest Operating Steam Locomotive : Jarrett, Les: Movies & TV

8650 UP Challenger 4-6-6-4, #3942, Black & Graphite, Coal Tender, No-S

Scenic railroads, Locomotive, Train museum

Union Pacific 3977 4-6-6-4 Challenger Class Live Steam

Brass Guide Price & Data Guide for Challenger 4-6-6-4 Key Model Imports Trains

Any fading or imperfection soft focus on original will be reflected on reprint.

Western Maryland photo 4-6-6-4 Challenger Steam Locomotive 1212 Railroad Train

Union Pacific challenger 4-6-6-4 Steam Locomotive Chart

UP Donates Two Steam Locomotives to Non-Profit; 'Challenger' to Run Again - Railfan & Railroad Magazine