UP 1826 (SD40N) works the North Yard in Denver, Colorado.

UP 1826 (SD40N) sits on a siding in east Denver as a freight motors past and heads to the 36th Street Yard.

UP 1826 (SD40N) pulls up to the yard crew who will board as head to the north end of the yard.

I think Alfred Hitchcock would have liked this photo. UP 1826 (SD40N) works the Union Pacific's North Yard in Denver, Colorado as hundreds of birds circle, waiting for the chance to land on the tr... (more)

UP 1826 (SD40N) sits in the North Yard next to the motors belonging to the Rocky Mountaineer. Also note the UP heritage Rio Grande SD70ACe sitting at the service island.

A nice variety of motors occupy the Union Pacific's North Yard in Denver, Colorado.

UP 1826 SD40N moves past a trio of BNSF motors sitting in the Union Pacific North Yard.

UP 1826 (SD40N) moves a cut of hoppers for sorting in the Union Pacific's North Yard in Denver, Colorado.

UP 1826 (SD40N) passes three BNSF motors that are sitting in the Union Pacific's North Yard in Denver, Colorado.

Light power, including UP 1826 (SD40N) works the North Yard in Denver, Colorado.

UP 1826 (SD40N) works the ladder in the North Yard in Denver, Colorado.

UP 1826 (SD40N) works on sorting a string of cars in the Union Pacific's North Yard in Denver, Colorado.

The Union Pacific operations building for the North Yard in Denver, Colorado gets late evening sun as UP 1826 (SD40N) moves into the yard to sort cars.

UP 1826 (SD40N) pulls a cut of cars from the North Yard for sorting.

UP 1826 SD40N get ready to sort a string of cuts in the bathroom.