The California Zephyr runs through Eisele, Colorado as it heads up the Moffat Tunnel Sub.

An eastbound BNSF manifest freight with mostly tank cars filling out its consist, rolls downgrade through Big 10 Curve between Eisele and Rocky, Colorado, on the afternoon of February 13, 2016.

The California Zephyr runs through Eisele as it heads up the Moffat Tunnel Sub in Colorado.

UP 6372 (AC4400CW) rounds Big Ten Curve as it heads down grade from Blue Mountain.

UP 6372 (AC4400CW) runs down the hill at Eisele, Colorado as a BNSF freight with two Warbonnets heads up the Moffat Tunnel Sub.

The California Zephyr runs through Eisle on the Moffat Tunnel Sub.

The California Zephyr has just run through Big Ten Curve and is passing by the Eisele siding as it runs along the base of Blue Mountain.

The Winter Park Express Ski Train begins the journey through the Rocky Mountains, passing through Eisele on the Moffat Tunnel Sub.

The Winter Park Express Ski Train runs through Eisele, Colorado as it takes a load of skiers and snowboarders to the Winter Park Ski Resort.

Amtrak engine 142 leads the California Zephyr through Eisele, Colorado and will soon pass through 30 tunnels as it eventually crosses under the Continental Divide at Winter Park, Colorado.

It's not every day you get to see an elongated California Zephyr train. In this image you can see the special Veterans F40 engine and the three private cars on the back of the train. The cars inc... (more)

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)

The California Zephyr climbs the grade through Eisele, Colorado as it skirts Blue Mountain on the Moffat Tunnel Sub.

UP ACe 8850 brings a freight through Eisle at the base of Blue Mountain on the Moffat Tunnel Sub.

After running through Big Ten Curve, the California Zephyr gains in elevation and heads towards Blue Mountain through Eisele, Colorado.