UP 6276 (ES44AC) leads an oil can train through Tolland, Colorado on the Moffat Tunnel Sub.

BNSF 3839 (ET44C4) has just been serviced with fuel and sand and is ready to head to a waiting train in the Denver Yard.

BNSF 2949 (GP39-2) and mate move a single hopper through Longmont, Colorado.

BNSF 1908 (SD40-2) joins a Warbonnet in the BNSF engine yard in Denver, Colorado.

BNSF 9119 (SD70ACe) climbs the grade between Larkspur and Greenland, Colorado as it runs southbound on the Joint Line.

BNSF 9119 (SD70ACe) runs the S curve at Spruce, Colorado as it heads south on the Joint Line.

BNSF 7069 (ES44C4) leads a Warbonnet and a load of fiber optic cable as it runs through Wiggins, Colorado on the Brush Sub.

Sleet is falling as the Winter Park Express Ski Train heads back to Denver by running though Coal Creek Canyon on the Moffat Tunnel Sub.

The California Zephyr arrives in Keenesburg, Colorado as dawn breaks on the Brush Sub.

The California Zephyr meets a Kansas City Southern train waiting on the siding in Rocky, Colorado.

Amtrak engine #4 (P42DC) kicks up the snow as it leads the California Zephyr through Tolland, Colorado.

KCS 4765 (ES44AC) leads an oil train past Chemical as it heads towards Arvada, Colorado.

BNSF 4252 leads an auto rack train in the snow past the former Colorado Springs Depot in downtown Colorado Springs.

Heavy snow coats Palmer Lake as BNSF 4252 leads an auto rack train through town.

Heavy snow creates near whiteout conditions as a BNSF auto rack train runs the ridge at Spruce, Colorado.