UP 6750 (AC4400CW) leads a move of power in the Union Pacific's North Yard in Denver, Colorado.

Denver Rock Island Railroad's #88 (GP9) sits in the yard with two other DRIR blue motors.

BNSF Warbonnet 712 (Dash9) sits in the engine servicing facility yard in downtown Denver, Colorado.

Results of being hit by runaway cars in Denver. This one fared better than the 2505 it was paired with....all that was left of it was a bare frame.

UP 3814 (SD70M) joins a nice variety of heavy and light power in the North Yard in Denver, Colorado.

UPY 691 (GP15-1) pulls out a cut of cars from the Union Pacific's North Yard in Denver, Colorado.

UP 1826 (SD40N) has yard sorting duty as it heads into the North Yard for another cut of cars.

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)

A weary looking UPY 691 (GP15-1) works the Union Pacific's North Yard in Denver, Colorado.

UP 6162 (ES44AC) backs up to a string of cars which it will then take up the Moffat Tunnel Sub.

A cotton candy sunrise greets the riders of RTD commuter train 4023 as it heads towards Arvada, Colorado.

Denver Rock Island Railroad's #553 (SW8) works an industrial area in the north part of Denver, Colorado.

Denver Rock Island Railroad's #1083 (SW1500) heads back to the yard along Packinghouse Road in Denver, Colorado.

Denver Rock Island Railroad's #2101 (GP7U) sits in the Denver yard waiting for a new coat of paint.

UP 845 (GP38-2) sits with other light and heavy power waiting for service or assignments in the UP's North Yard in Denver, Colorado.