UP 8219 (ES44AC) gets ready to take a freight over the Broadway Bypass on its way to the Greeley Sub.

UP 2615 (ET44AC) joins other heavies as they take on fuel and sand at the Union Pacific's North Yard in Denver, Colorado.

RTD commuter train 4025 (Hyundai Eagle P3) takes the elevated section of track that runs past some new apartments and the BNSF engine servicing yard in Denver, Colorado.

RTD commuter train 4041 runs past a water tower at sunrise in Denver, Colorado.

BNSF 1899 (SD40-2) moves a cut of cars across the South Platte River as it works the Denver Yard.

UP 5672 (AC4400CWCTE) gets ready to leave the UP's North Yard with a freight and head east.

Norfolk Southern 4485 (AC44C6M) moves into the Denver Yard to a waiting train.

BNSF 1652 (SD40-2) still wears its Cascade Green colors from its Burlington Northern days. It has worn that paint for the pas 44 years.

BNSF 1899 (SD40-2) shuffles a cut of cars into the Denver Yard. You can find quite a few SD40-2's working the Denver Yard at any given time.

Two Union Pacific trains hold at the Broadway Bypass before getting a green signal to head towards the Greeley Sub via the Utah Belt through North Denver.

There is usually a lot to see in the Union Pacific's North Yard in Denver, Colorado. Light power will be shuffling cars in the yard and heavy power can usually be spotted coming and going at the ... (more)

BNSF 1899 (SD40-2) works a cut of cars in the Denver Yard. Notice the added AC unit on the front of the cab.

NS 4485 (AC44C6M) drops into the Denver Yard and will be in second position as it lashes up to an eastbound freight.

A variety of power, including BNSF 7773 (ES44DC) wait in the engine servicing yard in Denver for assignments.

BNSF 1879 (SD39-2) takes a turn humping cars into the Denver Yard.