BNSF 2708 (GP39-2) gets ready to leave the yard in Golden, Colorado and head to Denver.

BNSF 1600 (SD40-2) passes a pair of heavies as they sort a cut of cars in the Denver Yard.

Hudson Terminal Railroad's SD40-2 motors build a stack train in the terminal at Hudson, Colorado.

BNSF 8998 (SD70ACe) leads the Coors Beer Train out of the North Yard and heads for Golden, Colorado, home of the Coors Brewery.

BNSF 8998 (SD70ACe) leads the return Beer Train out of the Denver Yard and heads for Golden, Colorado.

UP 1507 (GP40M-2) works the North Yard in Denver, Colorado.

UP 1957 (SD40N) works the North Yard in Denver, Colorado, sorting a line of freight cars.

It is a light day in terms of Union Pacific motors at the North Yard in Denver, Colorado.

BNSF 8753 (SD70ACe) runs towards the yard in downtown Denver, Colorado as other motors jockey for position.

BNSF 5908 (ES44AC) runs through Big Ten Curve on the Moffat Tunnel Sub.

NS 4130 (AC44C6M) runs past a signal in Keenesburg, Colorado as it heads west on the Brush Sub.

NS 4130 (AC44C6M) and an RTD commuter train run past the Riverside Cemetary in Denver, Colorado.

NS 4130 (AC44C6M) runs a grain train through Tonville, Colorado as it heads towards Denver on the Brush Sub.

BNSF 6266 (ES44AC) sits by the fueling rack at the engine servicing facility in Denver, Colorado.

BNSF 5246 (Dash9) gets ready to pull a train out of the yard in Golden, Colorado.