The California Zephyr runs through Arvada, Colorado amid snow and strong winds.

Coming down Blue Mountain this UP coal is having quite the struggle with the 2% grade. A lot of brake dust was seen after this shot!!

The California Zephyr runs through Arvada, Colorado on the Moffat Tunnel Sub.

A friendly wave from the conductor greets the photographer as AMTK 137 (P42DC) runs through Arvada, Colorado on its way to the Moffat Tunnel in the Colorado Rocky Mountains.

The California Zephyr leaves Denver behind as it continues the journey into the Colorado Rocky Mountains.

Union Pacific MoPac Heritage #1982 passes a signal as it heads towards Arvada, Colorado on the Moffat Tunnel Sub.

The sun is setting over the Colorado Rocky Mountains as the California Zephyr heads towards Arvada, Colorado.

The first official run of the "Rockies to the Red Rocks" Rocky Mountaineer heads west on UP's Moffat Tunnel Sub. The Rocky Mountaineer worked out an arrangement with Union Pacific to all... (more)

UP 7090 (AC4400CW) leads a freight past the art piece called 'Cold War Horse', which was created to acknowledge the history of Rocky Flats Nuclear Weapons Plant, which used to sit on the property ... (more)

The California Zephyr leaves the Denver skyline behind as it takes the Moffat Tunnel Sub towards the Colorado Rocky Mountains.

An AC4400CW, an ET44AC, and an ES44AC lead a westbound coal empty as it snakes its way around Big Ten and toward a clear signal at the east end of Eisele (formerly Clay). The lead unit, UP 6321, c... (more)

After getting stuck in the siding at Rocky for close to three hours due to maintenance, this coal empty is finally on the move again, climbing out of Rocky and up and around Big Ten. The train is ... (more)

The eastbound Zephyr rolls east on the main at Eisele as it continues the journey east toward Denver and points beyond. Eisele is really the last place the eastbound Zephyr will skirt the front ra... (more)

West of Denver on the former Denver and Rio Grande Western - now UP's Moffat Tunnel Sub - you'll find the awesome engineering of Little Ten and Big Ten Curves. The original architects of the ra... (more)

Just east of Rocky, in Barbara's Gulch, the first westbound Zephyr to leave Denver on a Wednesday morning in almost eight months approaches a Clear (green) signal at the east end of Rocky. A lone ... (more)