Thick fog shrouds Fort Morgan, Colorado as the California Zephyr passes through while heading west on the Brush Sub towards Denver.

Two Phase VII P42's lead the California Zephyr through Tonville, Colorado as the sun just crests the horizon and kisses the tracks with a golden glow.

Auto Train was a bit late right behind 41.

Amtrak 20 speeds north towards Kemper Street with a rare phase 6 duo.

The California Zephyr climbs out of Coal Creek Canyon and heads west on the Moffat Tunnel Sub.

341 on 41

Amtrak engine #77 (P42DC) busts through the snow at Tolland, Colorado as it heads towards the Moffat Tunnel in the Colorado High Country.

Snow blankets the tracks of the Moffat Tunnel Sub as the California Zephyr drops down from Tunnel #1 at Plainview, Colorado.

Freezing temps and blowing snow greet the California Zephyr as it exits the east portal of the Moffat Tunnel.

The California Zephyr is led by two Phase VII P42DC's as they head into the Colorado Rocky Mountains at Plainview, Colorado.

Amtrak 51 heads west through a grove of pine trees with a rare dash 8 leader.

Amtrak engine #204 (P42DC) in a Phase VII paint scheme leads the California Zephyr over Highway 72 in Coal Creek Canyon, Colorado.

Snow is falling and the open flame switch heaters are burning as AMTK 518 leads Hiawatha service 331 through the A2 interlocking. The 518 and Superliner would be cut off in Milwaukee for crew tra... (more)

Heavy snow fell along the Colorado Front Range as we see the California Zephyr climb out of Coal Creek Canyon towards Tunnel #1.

A pair of colorful Phase VII Amtrak engines lead the California Zephyr through a snowy Coal Creek Canyon as the train heads into the Colorado Rocky Mountains.