UP 1357 (ex DRGW GP40-2) waits for its turn to shuffle cars in the North Yard in Denver, Colorado.

UP 1357 (former Rio Grande GP40-2) runs into the North Yard in Denver, Colorado to sort cars.

A variety of Union Pacific power waits for servicing or orders in the North Yard in Denver, Colorado.

UP 1357 (ex Denver & Rio Grande Western GP40-2) sits next to the operations building in the Union Pacific's North Yard in Denver, Colorado.

UP 1357 (GP40-2) brings its crew in from the North Yard in Denver, Colorado.

Heavy snow falls on the Union Pacific's North Yard, catching UP 1357 (GP40-2) as it moves a cut of cars for sorting.

UP 1357 (former Denver & Rio Grande Western GP40-2) waits in the yard for orders to shuffle freight cars.

UP 1357 is a 51-year-old GP40-2 that was built in 1972 for the Rio Grande railroad.

UP 1357 (GP40-2) works the North Yard in Denver, Colorado.

You can still find GP40-2's working in Denver. UP 1357 sits in the Union Pacific's North Yard waiting for an assignment.

UP 1357 is working the North Yard in Denver, Colorado. It was built in 1972 and is a former Denver & Rio Grande Western engine, as evidenced by the unique nose light position that has been blanke... (more)

The sun has just come up and illuminates the power in the Union Pacific's North Yard, including UP 1357, an ex DRGW GP40-2.

UP 1357 (GP40-2) works in the Union Pacific's North Yard in Denver, Colorado.

Here is a wide-angle view of the motors in the Union Pacific North Yard. On the right UP 1865 (SD40N) works sorting cars in the yard while the engines on the left either wait for service or assig... (more)

UP 1357 (GP40-2) and mate run a push-me, pull-me configuration in the North Yard, with cars coupled on each side as they work the classification ladders from both ends.