OmniTRAX #4011 (GP40-2LW) leads a freight out of Loveland, Colorado and heads to Johnstown.

Canadian National 3321 (AC44C6M) leads a grain train on the Joint Line towards Littleton, Colorado.

BNSF 6618 (ES44C4) enters the Denver Yard and heads to a train.

BNSF 1600 (SD40-2) works the yard in downtown Denver, Colorado.

BNSF 4251 (ES44C4) runs a stack train through Fort Morgan, Colorado as it heads west on the Brush Sub.

BNSF 4251 (ES44C4) runs west on the Brush Sub through Hudson, Colorado.

BNSF 6329 (ES44AC) runs through Pinecliffe, Colorado as it heads west on the Moffat Tunnel Sub.

BNSF 8537 (SD70ACe) runs through Tunnel #29 at Pinecliffe, Colorado.

BNSF 8135 (ES44AC) leads the Z Train past Barr Lake at Brighton, Colorado.

The California Zephyr #6 train runs past Barr Lake in Brighton, Colorado as it heads east on the Brush Sub.

Amtrak engine #18 (P42DC) backs through the BNSF yard as it heads to Denver's Union Station.

BNSF 1720 (SD40-2) works the yard in Denver, Colorado.

BNSF 9325 (SD70ACe) sits in the yard at the engine servicing facility waiting for an assigned train.

BNSF 6618 (ES44C4) moves into the Denver Yard and to a waiting train.

BNSF 1600 (SD40-2) works a cut of cars in the yard in downtown Denver, Colorado.