An old-school Heritage I BNSF 1001 (Dash9) waits for a crew in downtown Denver, Colorado. The main line is adjacent to RTD's light rail line that shuttles passengers to Denver's Union Station fro... (more)

Inside the Diesel House at Union Pacific’s former Rio Grande Burnham Shops at Denver, Colorado, two machinists work on a cylinder of the 7FDL16 prime mover of UP GE AC4400CW No. 7334 on December... (more)

BNSF heavies stack up in the engine servicing yard in Denver, Colorado.

BNSF ACe 9285 leads a coal train into the Denver Yard and will hold on the Coal 1 track until a new crew arrives.

BNSF 3127 (GP50) heads to the Denver Yard to sort rail cars.

BNSF 6214 (ES44AC) waits in the BNSF servicing yard in Denver, Colorado as two pairs of light power pull out strings of cars for sorting.

BNSF 9285 (SD70ACe) leads an empty coal train under the Park Avenue Viaduct in Denver as it heads to the Denver Yard for a change in crew.

The California Zephyr arrives in Denver, Colorado just as the sunrise begins to kiss the glass of the downtown buildings.

A Loram maintenance of way train gets ready to leave the BNSF engine servicing facility in Denver, Colorado.

A Union Pacific ACe and a former Burlington Northern Cascade Green motor provide a colorful lineup with the BNSF pumpkins in the yard of the engine servicing facility in Denver, Colorado.

The California Zephyr has pulled into Denver Union Station which then gives a green light to BNSF 5785 (ES44AC) to take the morning Z train out of the intermodal facility in Denver, Colorado.

BNSF 3127 (GP50) heads into the Denver Yard early in the morning to sort cars.

The BNSF Beer Train heads out of Denver and will arrive at the Coors Brewery in Golden, Colorado.

UP 5767 (ES44AC) has just brought a train in and heads to the servicing island at the Union Pacific's North Yard in Denver, Colorado.

A wide-angle view of the Union Pacific's North Yard in Denver, Colorado shows the fuel and sand service islands on the left, the ready tracks in the middle (with a former Southern Pacific GP40M - ... (more)