UP 7853 (AC45CCTE) sits in Denver waiting for a new crew that will take the oil can train up the Moffat Tunnel Sub and across the Continental Divide.

Amtrak engineers Gary Meyer and Justin Anton pose in front of UP 5518 as they get ready to have a crew swap after bringing the California Zephyr down the Moffat Tunnel Sub. A Union Pacific motor ... (more)

An inbound UP freight led by UP 8013 (AC45CCTE) passes under the signal bridge before entering the North Yard in Denver, Colorado.

UP 7701 (AC45CCTE) leads a coal train past the Union Pacific's North Yard and the BNSF's Intermodal Facility in Denver, Colorado.

Archer Hill west of Cheyenne, Wyoming provides a great vantage point from which to shoot trains running west on the Transcon rail line.

UP 7882 (AC45CCTE) holds a freight at Speer, Wyoming until word comes that the line has been cleared of snow drifts.

UP 8080 (AC45CCTE) leads a freight around Blue Mountain and into Coal Creek Canyon on the Moffat Tunnel Sub.

UP 8080 (AC45CCTE) heads into the late evening sun at Tolland, Colorado as it heads west on the Moffat Tunnel Sub.

UP 7413 (AC45CCTE) runs past a Plymouth Special Deluxe automobile which has seen better days.

UP 8080 (AC45CCTE) leads an oil can train over Blue Mountain Road as it enters Coal Creek Canyon, Colorado.

UP 8080 (AC45CCTE) leads an oil can train around the elevated curve at Tolland, Colorado.

UP 8080 (AC45CCTE) pulls a long oil train through Rollinsville as it heads towards the Moffat Tunnel's East Portal.

UP 7701 (AC45CCTE) threads the needle running past the Union Pacific's North Yard and the BNSF's Intermodal facility in Denver, Colorado with a loaded coal train.

UP 5428 (C45ACCTE) has solo duty as it leads a freight through Lodgepole, Nebraska

UP 7507 (C45ACCTE) leans into the elevated curve at Speer, Wyoming as it passes the iconic steam era water tower.