With only minutes of sun left, UP 7745 (ES44AC) get a green light to head west under the signal bridge on the Moffat Tunnel Sub in Denver, Colorado.

A unit train carrying sand in loaded low gons pulls south into Butler Yard on the Roundhouse lead where it will tie down for the night.

With Twin Peaks and the Utah State Capitol Building looming in the distance, Union Pacific's North Platte to West Colton manifest leans into an elevated 35 mph curve, approaching Grant Tower in do... (more)

Union Pacific's North Platte to West Colton manifest accelerates up to track speed, departing Salt Lake City at 10th West. To the left of the 7745 is the Utah state capitol building and to the rig... (more)