UP 1865 (SD40N) leads a freight over the South Platte River in northeast Denver, Colorado.

The day is over for the crew of the Denver Rock Island Railroad's 1083 (SW1500) as they get ready to enter the yard and lock the gates.

The Denver Rock Island Railroad's 1083 (SW1500) runs light after having just dropped off a cut of cars for the BNSF to collect.

The Denver Rock Island Railroad's newest addition is DRIR 2101, a former Nebraska Central GP7U that will soon get the flag colors.

UP 8697 (SD70ACe) sits in the servicing line at the North Yard in Denver, Colorado.

UP 1826 (SD40N) shoves a cut of cars back into the North Yard in Denver, Colorado.

A dynamic sunrise greets the riders of the RTD commuter train that runs between Denver and Arvada, Colorado.

You can usually find one or two former Burlington Northern Cascade Green SD40-2's working the yard in Denver, Colorado.

BNSF 2857 (GP39-2) gets repositioned in yard of the engine servicing facility and will soon head to the Denver Yard to sort freight cars.

BNSF 2712 (GP39-2) climbs out of the bowl at the Denver Yard with a cut of cars.

A pair of P42's shove the California Zephyr backwards towards Denver's Union Station, passing under the Park Avenue Viaduct.

Private car Cyrus K Holliday, built in 1921, backs first into Denver's Union Station on the rear of the California Zephyr.

A visiting Ferromex engine spices up the pumpkin patch at the BNSF engine servicing facility in Denver, Colorado.

3 UP yard employees walk back to the operations building in the Union Pacific's North Yard.

An Amtrak engine sits in the North Yard with UP 700 (GP38N) and other light power.