After a quick stop at the Fort Morgan Amtrak Depot the California Zephyr leaves and heads towards Denver, Colorado.

The California Zephyr runs through a cut at Plainview, Colorado.

The California Zephyr backs into Denver's Union Station between the numerous catenary wires that support RTD's commuter rail system.

The California Zephyr runs through Bijou, Colorado just as a golden sunrise develops in the sky.

BNSF 2828 (GP39-2M) greets the California Zephyr as it leaves Denver for the Moffat Tunnel. Notice the 50th anniversary paint scheme on the second Amtrak engine.

A pair of Cascade Green ex Burlington Northern engines sit in the Denver Yard until called for action.

BNSF 8761 (SD70ACe) leads a loaded coal train towards Denver on the Brush Sub.

BNSF 6800 (ES44C4) leads the morning Z Train through Hudson, Colorado.

Amtrak's Winter Park Express runs through Arvada, Colorado as sunrise.

Heavy snow is falling as Amtrak's Winter Park Express leaves Denver and begins its run through the Colorado Rockies to the Winter Park Ski Resort.

Without a few visual clues to indicate otherwise, a quick glance could convince a viewer that this is a period photo of Rio Grande Southern 20 (4-6-0) waiting to pick up some freight cars for the ... (more)

BNSF 2549 (GP39-3) leads an oil can train from Hudson, Colorado to Denver.

UP 688 (Ex Missouri Pacific GP38-2) is among the units sitting in the Union Pacific's North Yard in Denver, Colorado.

Union Pacific Big Boy #4014 (4-8-8-4) runs through the iconic S curves of Archer Hill east of Cheyenne, Wyoming.

BNSF 5825 (ES44AC) leads an empty coal over a Rio Grande bridge in Larkspur, Colorado.