Sunrise at the BNSF engine servicing facility in Denver, Colorado finds a Maintenance of Way team getting ready to head out on the Joint Line for track improvements.

UP 1381 (Ex Southern Pacific GP40-2) holds station in the North Yard in Denver, Colorado.

This is the headquarters of the Denver Rock Island Railroad located in north Denver, Colorado.

A peek into the Diesel House reveals Southern Pacific GE AC4400CW No. 309 on Track 3, along with several other Union Pacific locomotives on adjoining tracks, at UP’s former Rio Grande Burnham Sh... (more)

UPY 691 (GP15-1) has somehow escaped the rebuild or repaint program but looks great in the weathered paint.

Amtrak engine #54 leads the California Zephyr through the North Yard as it heads towards Denver's Union Station.

There are 42 engines waiting for service or assignments in the yard of the BNSF engine servicing facility in Denver, Colorado.

A Norfolk Southern pony joins other UP motors at the service island in the North Yard in Denver, Colorado.

Denver Rock Island Railroad's GP9 (#88) gets ready to leave the yard.

Denver Rock Island Railroad's #553 (SW8) shuffles cars in a north Denver industrial area while storms fire off in the distance.

The California Zephyr leaves downtown Denver and passes under the Park Avenue Viaduct and by a Warbonnet waiting for service at the BNSF engine servicing facility.

UP heritage engine #1995 (SD70ACe) in the Chicago & Northwestern paint scheme waits for a crew that will then pilot the train over the Moffat Tunnel Sub.

BNSF Warbonnet #750 (Dash9) joins a NS Pony in the yard of the BNSF engine servicing facility in Denver, Colorado.

ATSF 4-6-4 3459 is leaving Denver with a six car train on May 23rd 1937. Otto Perry photo, from my collection.

The Denver Rock Island Railroad's GP9 moves a cut of cars in sub-zero degree weather.