Amtrak engine #45 (P42DC) runs through the signal tower in Denver at sunrise as it heads west on the Moffat Tunnel Sub.

A dynamic sky at sunrise sends the Winter Park Express Ski Train off towards the Colorado Rockies on the Moffat Tunnel Sub.

A golden sunset and the blue hour combine as the California Zephyr 6 train pulls into Denver, Colorado.

As snow falls, the wind whips, and the sun shines, the California Zephyr runs through Tolland, Colorado on its way to the Moffat Tunnel.

The Blue Hour falls along the Colorado Front Range as the California Zephyr 6 train approaches the North Yard in Denver, Colorado.

Amtrak engine #45 (P42DC) runs on the Brush Sub through Roggen, Colorado at sunrise.

A very dirty Amtrak engine #45 (P42DC) leads the California Zephyr out of the station at Glenwood Springs, Colorado

Tolland Amtrak 5 with AMTK. 45, 71, and P32-8BWH 512 third out deadheading to Oakland, CA on Sunday September 15, 2024. Public Road -Gr.Xing MP.47.22 “Center” at Tolland 8889’ E... (more)

The California Zephyr runs past the silo at Roggen, Colorado as sunrise tries to break through the clouds on the horizon.

This morning's California Zephyr had a rare addition for these parts; AMTK 512 which is a P32-8BWH being transported to California.

Sharp eyed viewers will notice a unique engine in the consist of this morning's California Zephyr 5 train as it runs through Roggen, Colorado at sunrise. In the third spot is a P32-8BWH being tran... (more)

The evening's California Zephyr #6 drops down the grade into Coal Creek Canyon as it heads to Denver's downtown Union Station.

The evening's California Zephyr #6 train exits Tunnel #1 at Plainview, Colorado and will drop down the grade to Coal Creek Canyon on its way to Denver's Union Station.

The California Zephyr runs through Wiggins, Colorado at sunrise.

The wildfires in Colorado create a golden glow at sunrise as the California Zephyr runs through Wiggins, Colorado.