BNSF 9122 (SD70ACe) leads a coal train through the refineries in Commerce City, Colorado on its way to Denver.

BNSF 9122 (SD70ACe) leads a coal train west on the Brush Sub towards Denver, Colorado.

UP 4533 (SD70M) leads an officer train through Barbara's Gulch between Chemical and Rocky, Colorado.

UP 2698 (AC4400CW) leads an oil can train through Leyden, Colorado.

A leased GMTX #2146 (GP38-2) repositions in the yard of the refinery in Cheyenne, Wyoming.

The eastbound California Zephyr #6 train meets the westbound California Zephyr #5 train at Rocky, Colorado.

Two Phase VII P42DC's lead the California Zephyr as it runs through Coal Creek Canyon, Colorado.

Heavy frost from sub-zero temperatures cotes the trees and grass as the California Zephyr rounds the corner at Blue Mountain and heads towards Coal Creek Canyon.

Amtrak engine #157 (P42DC) leads the California Zephyr through flocked trees at Pinecliffe, Colorado.

The California Zephyr runs through Coal Creek Canyon as it heads towards Tunnel #1 on the Moffat Tunnel Sub.

Sunrise catches the California Zephyr running towards Keenesburg, Colorado as it heads to Denver on the Brush Sub.

UP 4533 (SD70M) leads an officer passenger train around the windbreak at Big Ten Curve as it heads into the Colorado Rocky Mountains.

Coors Brewing Critter #997 (SW1000) makes smoke as it strains to move a cut of grain hoppers in the yard in Golden, Colorado.

BNSF 1826 (SD40-2 in old school paint) sits in the engine servicing yard in Denver, Colorado.

BNSF 8115 (ES44C4) leads a stack train through Littleton, Colorado as it heads south on the Joint Line.