Union Pacific 3977 or UP 3977 Challenger is a 4-6-6-4 steam engine locomotive originally owned by Union Pacific Railroad UP 3977 Challenger 4-6-6-4 American Locomotive Company Built 1943 UNION PACIFIC RAILROAD Steam Engine Locomotive Train North Platte, Nebraska

Union Pacific 3977 or UP 3977 Challenger

 is a 4-6-6-4 steam engine locomotive 

originally owned by Union Pacific Railroad

UP 3977 Challenger

4-6-6-4 American Locomotive Company Built 1943

UNION PACIFIC RAILROAD

Steam Engine Locomotive Train
North Platte, Nebraska 69101

3977 was donated to the City of North Platte, Nebraska 

for display on October 19, 1968. 

It is on display in Cody Park, next to EMD DDA40X #6922.