BNSF Warbonnet 712 (Dash9) is waiting for an assigned train after getting service in Denver, Colorado.

A faded pink Warbonnet sits in the pumpkin patch at the BNSF engine servicing facility in Denver, Colorado.

Snow clouds are moving in as UP 1957 (SD40N) works the North Yard in the evening sun.

Here is a good shot of the Union Pacific operations building in the North Yard in Denver, Colorado.

There is a colorful collection of engines in the Denver engine yard.

PRR to PC to CR to HLCX leader in a rainbow consist. No name on the slide, from my collection.

RTD commuter train 4049 (Hyundai P3 Eagle) runs past the BNSF engine servicing yard in downtown Denver, Colorado.

Loram LMIX 417 gets ready to leave the engine servicing yard in Denver, Colorado.

BNSF 6325 (ES44AC) brings an empty coal train into downtown Denver, Colorado, passing Empower Field where the Denver Broncos play.

A UP visitor and a Cascade Green former Burlington Northern engine join BNSF 8027 (ES44C4) and the Denver engine servicing facility.

A variety of locomotive sets wait outside the shops in Denver for servicing or assignment

Snow is falling in the Union Pacific's North Yard as UP 1957 (SD40N) heads towards a cut of cars that need sorting.

UP 1418 (GP40N) moves a cut of cars in the North Yard in Denver, Colorado.

Two engines of the Rocky Mountaineer passenger train are spotted in the North Yard as a new day begins in Denver, Colorado.

A visiting pony from the east coast waits for service in the BNSF engine servicing facility in Denver, Colorado.