Kansas City Southern 4709 (ES44AC) leads a Canadian grain train towards Palmer Lake, Colorado on the Joint Line.

BNSF 1656 (SD40-2) survives in its Burlington Northern Cascade Green paint as it waits for servicing at the BNSF engine facility in Denver, Colorado.

BNSF 9017 (SD70ACe) gets ready to lead a coal train over the Santa Fe Bridge in Larkspur, Colorado.

BNSF 9017 (SD70ACe) runs a loaded coal train through Greenland, Colorado.

BNSF 9017 (SD70ACe) drags a loaded coal train up the grade between Greenland, Colorado and Spruce.

BNSF 9017 (SD70ACe) leads a coal train south on the Joint Line through Monument, Colorado.

BNSF 9087 (SD70ACe) leads a loaded coal train towards Keenesburg, Colorado.

The late evening sun catches BNSF 8406 (SD70ACe) running in front of a rock formation at Palmer Lake, Colorado.

UPY 618 (GP15-1) sits in the North Yard in Denver, Colorado with a variety of other light and heavy power.

UP 1507 (GP40M) heads to the BNSF yard in Denver, Colorado with a cut of freight cards from the Union Pacific's North Yard.

Kansas City Sothern #4709 (ES44AC) leads a grain train towards Larkspur, Colorado as it runs south on the Joint Line.

BNSF 8578 (SD70ACe) leads a loaded coal train through Acequia, Colorado as it heads south on the Joint Line.

The California Zephyr whips up the snow as it runs through Leyden, Colorado on its journey into the Colorado Rocky Mountains.

Amtrak engine #192 (P42DC) leads the California Zephyr through Keenesburg, Colorado as the sunrise begins to break on the horizon.

UP 9050 SD70AH runs past a frozen Boulder Creek as it heads east through Tolland, Colorado on the Moffat Tunnel Sub.