UP 1826 (SD40N) works a cut of cars in the Union Pacific's North Yard in Denver, Colorado.

UP 5627 brings the RCODA south into Saginaw moments before crossing over both BNSF Fort Worth Sub mains

It is an active day in the Union Pacific's North Yard in Denver, Colorado.

UP 5932 leads an eastbound MLDDI through Dallas Union Station as a Trinity Railway Express commuter trains awaits its westward departure towards downtown Fort Worth

Fresh snow covers the North Yard in Denver, Colorado as UP 1826 (SD40N) works on sorting a cut of cars into the various ladders in the yard.

UP 1826 (SD40N) sits in the North Yard in Denver, Colorado waiting for the call to sort freight cars.

Across a Martian landscape.

UP 6928 leads a westbound Z at the Apache Trail road crossing in Cabazon.

A solo SD70ACe leads a long string of empty well cars westbound near Cabazon.

UP's Employee Assistance Program unit #8388 leads a long ZG2LC between Fingal and Cabazon in the late evening.

UP 1982 scoots under the South Houston Street overpass with the daily MFWNL as they overtake the DGNO local

The Union Pacific brought Challenger #3995 to the 2001 NRHS convention hosted by the St. Louis Chapter NRHS, shown here enroute to St. Louis. The convention paid homage to the 150th anniversary of... (more)

North Yard. A variety of equipment sits at Union Pacific Railroad's North Yard in Denver, CO. The yard offices sit near W 48th Ave and Kalamath St, and feature a large "North Yard&... (more)

UP's Robertson rock train heads east to the Cabazon facility for another load, following closely behind UP 2575 east.

Early morning deep in San Timoteo Canyon at Hinda finds an eastbound manifest lead by UP 2575.