The paint on the 700 series Warbonnets still looks good. Here BNSF 755 (Dash 9) waits for a green to take a freight south on the Joint Line from Denver to Pueblo, Colorado.

UP 7233 (AC4400CW) and two mates move into the North Yard towards a waiting train.

UPY 691 (GP15-1) muscles a cut of cars into the North Yard ladder.

UPY 691 (GP15-1) moves out a cut of oil tank cars from the fueling station at the North Yard in Denver, Colorado.

RTD 4037 (Hyundai Eagle) arrives in lower downtown Denver as it passes the BNSF engine servicing facility.

AMTK 800039, named the 'Cyrus K Holliday', is on point as the California Zephyr backs into Denver's Union Station. The beautiful Pullman car was built for the Soo Line in 1921.

BNSF 6384 (ES44AC) moves past a GP30 at the yard of the engine servicing facility in Denver, Colorado.

The Union Pacific's Big Boy engine #4014 (4-8-8-4) gets the steam fired up in preparation for backing into Denver's Union Station where it will be displayed for a day before heading back to Cheyen... (more)

UP 1357 (GP40-2) works in the Union Pacific's North Yard in Denver, Colorado.

UP 1507 (GP40M-2) sits with other light motors in the Union Pacific's North Yard for their turn to shuffle cars.

UP 6212 (AC440CW) waits with anther train for a green to head west on the Moffat Tunnel Sub.

Union Pacific EMD SD70M No. 3925 sits out on front of the main (backshop) building at UP’s Burnham Shops at Denver, Colorado, on January 21, 2016. The railroad closed this former Rio Grande faci... (more)

A shiny refurbished UP 5395 (ES44AC) waits for a green on the bypass line out of the North Yard in Denver, Colorado.

Here is a wide-angle view of the motors in the Union Pacific North Yard. On the right UP 1865 (SD40N) works sorting cars in the yard while the engines on the left either wait for service or assig... (more)

UP 1357 (GP40-2) and mate run a push-me, pull-me configuration in the North Yard, with cars coupled on each side as they work the classification ladders from both ends.