Snow is falling as the California Zephyr runs through Coal Creek Canyon, Colorado.

Amtrak engine #172 (P42DC) leads the California Zephyr over the bridge spanning Highway 72 in Coal Creek Canyon, Colorado.

UP 9080 (SD70AH) has just run through Coal Creek Canyon and leads a freight up the grade towards Tunnel #1 at Plainview, Colorado.

The morning California Zephyr train out of Denver, Colorado runs through Coal Creek Canyon and will soon start the climb towards the Continental Divide and the Moffat Tunnel.

UP 9080 (SD70AH) crosses over Highway 72 in Coal Creek Canyon as it leads an oil can train towards Tunnel #1 at Plainview, Colorado.

Snow from the previous day's storm blankets the ground as the California Zephyr runs past a ranch in Coal Creek Canyon, Colorado.

The California Zephyr climbs out of Coal Creek Canyon, Colorado towards Tunnel #1 on the Moffat Tunnel Sub.

A Denver, CO to Provo, UT manifest train grinds up the 2.1% grade of Coal Creek Canyon as the headend nears Tunnel 1.

The vantage point on the top of the hill next to Tunnel #1 provides a view of the California Zephyr as it runs through Coal Creek Canyon, Colorado.

The California Zephyr runs through Coal Creek Canyon as it heads up the Moffat Tunnel Sub.

The California Zephyr runs through Coal Creek Canyon as it heads up the Moffat Tunnel Sub.

The California Zephyr climbs the grade out of Coal Creek Canyon and heads towards Tunnel #1 on the Moffat Tunnel Sub.

An eastbound Burlington Northern Santa Fe freight exits Tunnel 1 and fills the horseshoe curve at the mouth of Coal Creek Canyon as it drops downgrade between Plain and Clay, Colorado, on a dry Ja... (more)

UP 5857 leads an oil can train into Coal Creek Canyon on the Moffat Tunnel Sub.

With 74 loaded cars of Utah crude oil pushing down on the drawbars, UP 8835 slowly negotiates the mountain grade and tight curves of Coal Creek Canyon with its heavy oil train. In the background, ... (more)