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

Union Pacific Challenger No. 3985

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

American-Rails.com on X: An American Locomotive builder's photo featuring Northern Pacific 4-6-6-4 Challenger #5119 (Z-6), circa 1937. / X

MTH Premier line O gauge 4-6-6-4 Challenger

Union Pacific's very first 4-6-6-4 Challenger, CSA-1 class #3800, leans into a curve at Durham, Wyoming in August of 1956. Despite being eclipsed by the later 3900-series Challengers, the 4000-series Big Boys

UP train, engine number 3938, engine type 4-6-6-4 - Photographs - Western History - Denver Public Library Special Collections and Digital Archives Digital Collections

Steam locomotive profile: 4-6-6-4 Challenger

Pin by Devin Mcmahon on Large Steam locomotives. Steam trains photography, Steam locomotive, Steam engine trains

Union Pacific 4-6-6-4 LEGACY Challenger (coal fired) #3967

Sold at Auction: American Locomotive Company / Alco Union Pacific 4-6-6-4 Challenger # 3902 Framed Builders Photograph

Union Pacific steam locomotives, Challenger 4-6+6-4 # 3941…

4-6-6-4 Challenger Steam Locomotives

Western Pacific Railroad 4-6-6-4 Steam Locomotive 401-407 Images

8x10 photograph. Date stated in description is date of image; NOT the date the photograph was printed. , Every bit of information about this imag

Union Pacific Railroad 4-6-6-4 Challenger #3895 steam up at idle photo

4-6-6-4 Challenger