BNSF 8012 (ES44C4) muscles a freight through towards Tunnel 2 on the Moffat Tunnel Sub.

The California Zephyr runs through Plainview, Colorado as it begins the journey into the Colorado Rocky Mountains.

UP 5382 (ES44AC) begins the climb through Big Ten Curve which will help the train achieve a constant 2% grade in elevation.

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 7869 (ES44DC) waits for a passing westbound BNSF freight and then will proceed eastbound down the mountain on 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.

The California Zephyr has heritage engine 130 (P42DC) on point as it heads towards Tunnel 29 at Pinecliffe, Colorado.

UP 5382 (ES44AC) leads a long freight through the signals at Crescent, Colorado as it climbs towards the Moffat Tunnel.

The California Zephyr arrives at the Glenwood Springs Depot with heritage motor 184 on point.

The California Zephyr runs the siding signal at Crescent, Colorado as it heads into the Rocky Mountains.

Amtrak's Winter Park Express Ski Train provides riders with stunning views of going through 30 tunnels between Denver and the ski resort on the west side of the Continental Divide.

The Amtrak Winter Park Express Ski Train has had a successful year, shuttling passengers to and from Denver and the Winter Park resort. Every Friday, Saturday and Sunday morning those living on B... (more)

An 8 motor lashup led by UP 5382 (ES44AC) pulls a freight through Crescent, Colorado.

Amtrak's California Zephyr runs with a triple engine configuration as it passes through Crescent, Colorado and by Gross Reservoir, which can be seen in the background.

Amtrak's Winter Park Express Ski Train heads up the grade at Eisele, Colorado as it climbs towards the Moffat Tunnel District. Snow the night before has frosted the foothills for an extra-scenic ... (more)