UP 801 (GP38-2) waits for the call to action to sort cars in the Union Pacific's North Yard in Denver, Colorado.

A Norfolk Southern pony joins other UP motors at the service island in the North Yard in Denver, Colorado.

UP 801 (GP38-2) sits with other light power in the Union Pacific's North Yard in Denver, Colorado, waiting for the call to take its turn shuffling rolling stock.

The Union Pacific yard team on UP 801 (GP38-2) give a friendly wave as they head into the North Yard in Denver, Colorado.

UP 801 (ex-Missouri Pacific GP38-2) holds in the Union Pacific's North Yard in Denver, Colorado as a RTD Commuter Train runs on the elevated section of track.

UP 801 (GP38-2) works the North Yard in Denver, Colorado.

UP 801 (GP38-2) works the North Yard shuffling cars via remote control operator.

UP 801 (GP38-2) works the yard in front of the operations building in the Union Pacific's North Yard.

If you are in Denver for the day you should stop by the Union Pacific's North Yard in Denver, Colorado, where you can get an unobstructed view of light power shuffling cars in the large yard to he... (more)

The Armour Yellow of the UP engines really pops as they sit in the fresh snow in the North Yard in Denver, Colorado.

UP 801 (GP38-2) shoves the last cut of cars in the North Yard. The bridge spanning the tracks provides a great vantage point for watching the yard action.

The three-person crew from UP 801 are done for the day after shuffling cars in the Union Pacific's North Yard in Denver, Colorado.

The yard crew has just released the last cut of cars from UP 801 (GP38-2) and will get ready to hook up to another string.

UP 801 (GP38-2) gets ready to pull a cut of cars out of the Union Pacific's North Yard in Denver, Colorado.

UP 801 (GP38-2) sits in the UP's 36th Street Yard. in the 12 years since this photo was taken the 36th Street Yard has gone through a massive transformation, which now includes RTD commuter rail,... (more)