You can still find GP40-2's working in Denver. UP 1357 sits in the Union Pacific's North Yard waiting for an assignment.

UP 1980 (GP38N) sits on the ready track next to the fueling island in the Union Pacific's North Yard in Denver, Colorado.

UP 6675 (AC4400CW) leads an oil can train through the North Yard in Denver, Colorado.

UP 1381 (ex-Southern Pacific GP40-2) works in the Union Pacific's North Yard in Denver, Colorado.

The California Zephyr runs through the North Yard and past the former Colorado and Southern water tower.

Two warbonnets are spotted waiting for service in the BNSF engine yard in Denver, Colorado.

UP 1865 (SD40N) waits in the North Yard for its turn to shuffle freight cars.

The majority of power in the Denver North Yard on this day is light units, including UP 1507 (GP40M).

UP 6750 (AC4400CW) has just dropped of a string of coal cars in the Union Pacific's North Yard in Denver, Colorado.

The Denver Rock Island Railroad operates a nice variety of vintage power. DRIR 417 (on the right) is a 74-year-old NW2 that was built in 1948 for the Saint Louis-San Fransisco Railroad. It also ... (more)

BNSF 7681 (ES44DC) joins other BNSF heavies waiting for service or assignments at the engine servicing facility in Denver, Colorado.

UP 1381 (ex SP GP40-2) works the North Yard in Denver, Colorado.

UP 6750 (AC4400CW) leads a move of power in the Union Pacific's North Yard in Denver, Colorado.

Denver Rock Island Railroad's #88 (GP9) sits in the yard with two other DRIR blue motors.

BNSF Warbonnet 712 (Dash9) sits in the engine servicing facility yard in downtown Denver, Colorado.