The California Zephyr runs through Coal Creek Canyon's horseshoe curve and will soon head up the hill towards Tunnel #1.

After running through Coal Creek Canyon, the California climbs towards the first tunnel at Plainview, Colorado.

The California Zephyr runs through Coal Creek Canyon as it begins the journey of climbing through 30 tunnels towards the Continental Divide.

UP 6276 (ES44AC) leads an oil can train through Coal Creek Canyon on the Moffat Tunnel Sub.

BNSF 7080 (ES44C4) leads a freight past the volunteer fire department building in Coal Creek Canyon, Colorado.

The two lead motors of the California Zephyr reach the sunshine as fog clouds coat to tops of the foothills in Coal Creek Canyon, Colorado.

BNSF 7417 (ES44DC) leads a Warbonnet and a Heritage I unit through Coal Creek Canyon as it begins the journey up the Moffat Tunnel Sub.

The fog clouds are moving into Coal Creek Canyon just as the California Zephyr arrives on its way up the Moffat Tunnel Sub.

BNSF 7080 (ES44C4) leads a freight through Coal Creek Canyon and will soon arrive in Denver, Colorado.

Amtrak heritage engine #130 (P42DC) draws in the photographers as it rounds the horseshoe curve in Coal Creek Canyon, Colorado.

After leaving Denver the heritage engine 184 guided the California Zephyr through Coal Creek Canyon, passing a farm along the way.

The Amtrak Winter Park Express Ski Train runs over the former Rio Grande Bridge in Coal Creek Canyon and gets ready to run through 30 tunnels on its way to the ski resort.

Amtrak's Winter Park Express Ski Train climbs towards Tunnel 1 as it takes a full load of passengers from Denver to the ski resort for a day of skiing, tubing and snowboarding.

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

The California Zephyr climbs the 2% grade up to Tunnel 1 on the Moffat Tunnel Sub.