Union Pacific train 717, the Los Angeles Challenger, is seen in Los Angeles at Pasadena Junction in 1940. Otto Conrad Perry photo, from my collection.

A matched pair of UP SD70Ms head up Tehachapi Pass to gather a work train from Tehachapi.

About a mile north of Mojave on UP's Lone Pine Sub finds empty wind turbine flats ready to depart on a cold afternoon in the Mojave Desert.

Westbound stacktrain turns the corner at Shawmut.

Empty Cement hoppers crossing from the cutoff to BNSF at Summit