The California Zephyr runs through Tunnel 15 as it heads east down the Moffat Tunnel Sub and towards Denver, Colorado.

The California Zephyr runs through Tunnel 13 on the Moffat Tunnel Sub and will next enter Tunnel 12 on its way to Plainview, Colorado.

BNSF 8547 (SD70ACe) shoves a freight through the South Draw and towards Tunnel 17 on the Moffat Tunnel Sub.

BNSF 8384 (ES44C4) leads an oil can train through Plainview, Colorado.

The Rocky Mountaineer passes through Tunnel 14 and gets ready to enter tunnel 13 on the journey down the east side of the Colorado Rockies. It will soon arrive in Denver and drop off passengers w... (more)

Rocky Mountaineer's colorful passenger train runs through Tunnel 15 in the South Draw on the Moffat Tunnel Sub near Crescent, Colorado. The train has been a popular attraction as it runs a weekly ... (more)

Rocky Mountaineer's color-matched engine 8021 (GP40-3) runs through the South Draw on the Moffat Tunnel Sub near Crescent, Colorado.

Amtrak engine 202 leads the California Zephyr through the area known as the South Draw on the Moffat Tunnel Sub.

UP 6770 (AC4400CW) leads a freight under threatening skies at Crescent, Colorado.

Amtrak engine #202 (P42DC) leads the California Zephyr through Tunnel 15 as it runs towards Crescent, Colorado.

BNSF 5622 (AC4400CW) leads the LauDen train through Crescent on the Moffat Tunnel Sub.

Amtrak heritage engine 184 (P42DC) runs through the rock formations of the South Draw on the Moffat Tunnel Sub.

BNSF 5622 (AC4400C) leads a freight towards Tunnel 17 as it runs eastbound through the trees on the Moffat Tunnel Sub.

The California Zephyr heads into Tunnel 17 just below the photographer. The third engine in line is a new Siemens Charger that was being sent to California.

The California Zephyr runs through Tunnel 15 on the Moffat Tunnel Sub just east of Crescent, Colorado.