UPY 618 (GP15N) sorts a string of freight into the North Yard ladders in Denver, Colorado.

BNSF 1984 (SD40-2) moves into the intermodal facility to pull a cut of container cars out of the yard.

BNSF 6294 (ES44AC) waits for orders to head to the Denver Yard and a waiting train.

UP 801 (GP38-2) joins other power in the Union Pacific's North Yard in Denver, Colorado.

A Union Pacific freight leaves the North Yard on Track 1 and will soon be running through the tunnels on the Moffat Tunnel Sub.

UP 688 (GP38-2) runs into the Union Pacific's North Yard in Denver, Colorado to sort freight cars.

UP 5571 (AC4400CW-CTE) leads a six-headed train out of the North Yard in Denver, Colorado, and heads west on the Moffat Tunnel Sub towards the Colorado Rocky Mountains.

A BNSF Mi-Jack crane is about finished unloading a stack train at the intermodal facility in Denver, Colorado, just as BNSF 5640 (AC4400CW) brings in a fresh set of cars.

This morning's California Zephyr had a rare addition for these parts; AMTK 512 which is a P32-8BWH being transported to California.

Canadian Pacific and Kansas City Southern units spice up the BNSF engine servicing facility in Denver, Colorado.

A consist with variety moves into the Denver Yard and to a waiting train.

A crewman guiding a stack track past the Union Pacific's North Yard holds on tight as BNSF 7875 leads a freight towards Denver on the adjacent track.

A quartet of light power sit at the BNSF engine servicing facility in downtown Denver, Colorado.

Missouri Pacific E7A-B pairs 7016 resting between runs of the Colorado Eagle at D&RGW's yard in Denver, Colorado on June 10, 1960. The 7016 was part of an order for four A-B pairs delivered in Jun... (more)

BNSF 7875 (ES44DC) leads the Laurel, Montana to Denver, Colorado train past the Union Pacific's large North Yard in Denver.