UP 6454 (AC4400CW) sits in the North Yard in Denver until the green is given to journey up the Moffat Tunnel Sub and over to Grand Junction in the west side of Colorado.

UP 6454 (AC4400CW) waits in the North Yard in Denver, Colorado before taking an officers special up the Moffat Tunnel Sub.

BNSF ACe 9007 runs past a meadow of wild sunflowers as it heads west on the Brush Sub at Keenesburg, Colorado.

BNSF 7205 (ES44DC) passes a silo as it heads into the sunrise at Roggen, Colorado.

BNSF 1798 (SD40-2) moves a cut of cars out of the Denver Yard.

Denver Rock Island Railroad's GP38-2 (A former Mount Hood Railroad motor) moves a load of oil cans to a yard in Central Denver, Colorado.

Denver Rock Island Railroad's GP38-2 (A former Mount Hood Railroad motor) drops off a couple of oil cans in the yard in Central Denver, Colorado.

BNSF 1798 (SD40-2) crosses the South Platte River as it pulls a cut of cars out of the Denver Yard.

UPY 618 (GP15-1) was built in September of 1979 and can be found still working at the North Yard in Denver, Colorado.

Heavy snows blanket a colorful RTD commuter rail train as it runs pas the BNSF engine servicing facility in Denver, Colorado.

BNSF 4419 (Dash9) runs long hood forward as it heads into the Denver Yard where it will be lashed to an awaiting train.

Here is a wide-angle view of the BNSF engine servicing facility in Denver, Colorado.

Heavy BNSF motors are repositioning in the engine servicing facility as they will soon get order to head to the yard for a train assignment.

Amtrak engine #194 (P42DC) backs the California Zephyr into Union Station in downtown Denver, Colorado. The myriad of catenaries support RTD's Commuter Rail trains that also use the station.

A Union Pacific motor sits at the servicing island at the BNSF engine facility in downtown Denver, Colorado.