BNSF 4461 (Dash9-44CW) leads a freight over the Cache La Poudre River in Fort Collins, Colorado.

BNSF 2549 (GP39-3) runs through Keenesburg on the Brush Sub.

BNSF 2530 (GP39-3) leads a short freight into the siding at Broomfield, Colorado.

KCS 4709 (ES44AC) leads a train of grain towards Spruce, Colorado on the Joint Line.

A dynamic sunset provides a colorful background as BNSF 9094 (SD70ACe) leads an empty coal east on the Brush Sub through Hudson, Colorado.

BNSF 1665 (SD40-2) sits waiting for service at the BNSF engine facility 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 8995 (SD70AH) muscles a mega coal train down through Tolland, Colorado on the Moffat Tunnel Sub.

KCS 4709 (ES44AC) runs through Monument, Colorado as it heads south on the Joint Line towards Colorado Springs.

KCS 4709 (ES44AC) runs towards Larkspur, Colorado on the Joint Line.

BNSF 7872 (ES44DC) heads into the Keenesburg Cut with a stack train as it runs east on the Brush Sub.

Light snow falls on BNSF Warbonnet 724 (Dash9) as it waits for service in the engine facility in Denver, Colorado.

BNSF 1653 (SD40-2) runs light through the heavy snow in Golden, Colorado.

BNSF 4234 (ES44C4) waits for a green signal at Roggen, Colorado.

BNSF 8115 (ES44C4) heads into the S curves at Spruce, Colorado as it leads a stack train south on the Joint Line.