UP 7928 leads a westbound stack train. The DPU, UP 7140, can be seen forty-six cars back near the signals with another forty-one cars trailing.

An eastbound Union Pacific coal load drops downgrade through Eisele (formerly Clay), Colorado, on August 11, 2015. Three levels of track can be seen from this location near Big 10 Curve. The train... (more)

Two clean Union Pacific GEs lead the eastbound UP coal train that is exiting Big 10 Curve and heading for Rocky, Colorado, seen directly above the locomotives on August 11, 2015. Above the lead lo... (more)

As a Union Pacific coal train drops downgrade approaching Rocky, Colorado, the lone DPU holds back the train near the east switch at Eisele (formerly Clay), Colorado, on August 11, 2015. When watc... (more)

The DPU on a UP stack train ascending to Tehachapi snakes through the curves at Marcel.