Amtrak engine #5 (P42DC) leads the California Zephyr through Tolland, Colorado on the Moffat Tunnel Sub.

Snow is falling as the California Zephyr runs through Chemical, Colorado as it heads west on the Moffat Tunnel Sub.

The California Zephyr heads through the cut in Coal Creek Canyon as it runs on Moffat Tunnel Sub into the Colorado Rocky Mountains.

A golden sunset casts a glow over the California Zephyr as it heads towards Union Station in downtown Denver, Colorado

The California Zephyr runs through the signal tower in Denver as the sun sets for the evening.

AMTK engine #51 (P42DC) arrives in Denver at sunset carrying esteemed Conductor Brad, who was experiencing his last trip to Denver as an Amtrak conductor. Brad retired after 30 amazing years in th... (more)

The California Zephyr gets ready to enter the east portal of the Moffat Tunnel at Tolland, Colorado.

The California Zephyr runs past the signals at Leyden, Colorado as it heads to Denver's Union Station.

Amtrak engine #18 (P42DC) leads the California Zephyr 6 train through Leyden, Colorado as it heads to Denver on the Moffat Tunnel Sub.

The California Zephyr runs past a highway maintenance facility in Coal Creek Canyon, Colorado.

The 'bloody nose' Phase I heritage locomotive begins its push up the grade of Raton Pass after making its final stop in Colorado in the town of Trinidad. Though hard to imagine, within the next 24... (more)

The westbound California Zephyr rips through Troublesome, where trains have picked up time between canyons for decades.

Amtrak 5 rolls slowly through Byers Canyon just west of Hot Sulfur Springs, with Amtrak 203 in tow. Once it exits the canyon, it will hit the gas all the way to Kremmling before slowing down to en... (more)

Amtrak’s westbound California Zephyr is about to plunge into Tunnel 42 just east of Radium, Colorado, on June 24, 2024.

Amtrak #5 slides through DeBeque Canyon