The California Zephyr heads towards the east portal of the Moffat Tunnel, kicking up snow along the tracks.

The California Zephyr emerges from Tunnel #1 at Plainview, Colorado after a strong winter storm and freezing fog has frosted the landscape.

The westbound California Zephyr passes through a Winter Wonderland in the midst of the area known as the Tunnel District. This is on UP's Moffat Tunnel Subdivision, located about 26 miles west of ... (more)

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.

Amtrak engine #135 (P42DC) whips up the snow pulling the California Zephyr through Leyden, Colorado as it leaves the Denver Area for the Moffat Tunnel Sub.

The California Zephyr exits the first of 30 tunnels as it heads into the Colorado Rockies during a heavy snow storm.

Heavy snow and freezing fog greet the California Zephyr as it gets ready to enter the east portal of the Moffat Tunnel at Tolland, Colorado.

It was a magical morning on the Moffat as freezing frost and snow flock the entire valley, providing a winter wonderland for the passengers and crew on the California Zephyr as it heads into the C... (more)

The California Zephyr runs through Tunnel 3 at Plainview on the Moffat Tunnel Sub.

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.

Amtrak’s California Zephyr passes the site of Tunnel 41, removed many years ago by Rio Grande, in Little Gore Canyon approaching Radium, Colorado, on the afternoon of September 19, 2023.

UP 7242 (AC4400CW) has just navigate through Gore Canyon and Hot Sulphur Springs and will soon be running through Byers Canyon before hitting Winter Park and the Moffat Tunnel.

The California Zephyr #6 train has just left the Fraser station and will soon be running through the 6.2-mile-long Moffat Tunnel as it heads to Denver, Colorado.