A unique line-up of steam power in the Blue Hour at the steam shop in Cheyenne, Wyoming includes UP 5511, UP 'Big Boy' 4014, UP 844, and UP Challenger 3985.
UP 4922 (SD70M) leads a freight towards Peckham, Colorado on the Greeley Sub.
UP 1357 (GP40-2) works the North Yard in Denver, Colorado.
UP 4449 (SD70M) brings a train of hopper cars into the yard at LaSalle, Colorado.
The doors are open on a hot day as UP 1957 (SD40N) heads for the barn after a day of sorting cars.
The remote operator of UP 1957 (SD40N) catches a ride back to the barn after a day of sorting cars in the North Yard.
UP 1817 (SD40N) heads deeper into the North Yard in Denver, Colorado to sort train cars.
UP 1817 (SD40N) gets repositioned in the North Yard in Denver, Colorado.
UP 4922 (SD70M) leads a freight south on the Greeley Sub as it leaves LaSalle, Colorado behind.
The Rocky Mountaineer's GP40-3 engines sport a colorful paint scheme that match the passenger cars.
The California Zephyr leaves Denver Union Station and passes under the Park Avenue Viaduct on its way to the Moffat Tunnel sub and the Colroado Rocky Mountains.
An orange sunrise greets the passengers and crew of the California Zephyr as it runs past a silo in Keenesburg, Colorado.
An orange sunrise reflects off the side of the lead engine of the California Zephyr as it runs through Keenesburg, Colorado.
A bright Colorado sunrise casts an orange glow as the California Zephyr 5 runs towards Keenesburg, Colorado.