UP 9003 (SD70AH) leads a long oil can train down the valley into Tolland, Colorado after exiting the Moffat Tunnel east portal.

BNSF 6004 (ES44AC) leads the BNSF Provo train through tunnels 4, 3 and 2 as it heads to Denver, Colorado on the Moffat Tunnel Sub.

Amtrak engine #19 (P42DC) leads the California Zephyr through Keenesburg, Colorado at sunrise on the Brush Sub.

Two fresh-looking OmniTRAX GP40-2LW's (former Canadian National motors) hold the track at the large industrial facility in Windsor, Colorado.

Coors Critter #998 (SW1001) moves a cut of cars to the brewing facility in Golden, Colorado.

You can still find a working Grinstein in Denver, Colorado. BNSF 9709 (Executive SD70MAC) works the Beer Train that moves between the Coors Brewing plant in Golden, Colorado and the BNSF yard in ... (more)

With the majestic Boulder, Colorado Flatirons in the background, the California Zephyr runs through Little Ten Curve at Rocky as it begins the journey up the Moffat Tunnel Sub.

The crew of UP 1865 (long snoot SD40N) calls it a day after working the yard in LaSalle, Colorado.

Conductor on Back of Business car in Golden, Colorado. Surrounded by Caboose and Watertower

"A High Plains Drifter": C&T, former D&RGW K-27 2-8-2 #463, hustles west towards Osier outside of Antonito, CO with an empty stock car train in tow on October 19, 2023. This was taken on... (more)

"Late Night at Antonito": After a day's work on the eastern end of the D&RGW narrow gauge mainline, K-27 #463 simmers at the water tank on October 19, 2023. This photo was taken as part ... (more)

Clear blue skies mark the eastern end of the Rio Grande narrow gauge mainline as D&RGW #463 with an empty freight train marches west towards Osier at MP 308.3 on October 19, 2023. This photo was t... (more)

There is a mix of heavy and light power in the Union Pacific's North Yard in Denver, Colorado.

The sun has just risen as UP 845 (GP38-2) works a cut of cars into the ladder in the Union Pacific's North Yard in Denver, Colorado.

Snow from the previous day's storm blankets the ground as the California Zephyr runs past a ranch in Coal Creek Canyon, Colorado.