Amtrak engine #10 (P42DC) leads the California Zephyr through the Rainbow Cut, a geological feature of multi-colored layers of earth through which the Moffat Tunnel Sub runs.

UP 5105 (SD70M) leads the Rocky Mountaineer passenger train through Rainbow Cut at Plainview, Colorado. The high end train runs between Denver, Colorado and Moab, Utah, offering spectacular views... (more)

Amtrak engine 71 (P42DC) leads the California Zephyr up the steep grade to Tunnel 1 at Plainview, Colorado.

After leaving Denver, which can be seen in the upper right corner, the California Zephyr runs through the S curves at Rainbow Cut in Plainview, Colorado.

The California Zephyr rounds the corner as it climbs up to Tunnel 1 at Plainview, Colorado.

The snow is falling as BNSF 4128 (Dash944CW) strains to pull a freight on icy rails through Plainview, Colorado on the Moffat Tunnel Sub.

The California Zephyr drops down from Plainview, Colorado as it heads towards Coal Creek Canyon.

The California Zephyr runs along the foothills at Plainview, Colorado as it climbs in elevation on the Moffat Tunnel Sub.

UP 1982 leads a freight down the steep grade from Tunnel 1 at Plainview, Colorado.

Five first generation Rio Grande Geeps, lead by GP9 5943 in charge of a mainline freight at Plainview, Colorado in March 1969. Photo from my slide collection, Photographer J.B. Calvert.

UP 4533 (SD70M) leads a Union Pacific Officer's Special through the curves at Plainview before entering Tunnel 1 on the Moffat Tunnel Sub.

UP 4533 (SD70M) leads a long Officer Special train down the Moffat line at Plainview, Colorado.

The California Zephyr exits Tunnel 1 at Plainview, Colorado and gets ready to drop down into Coal Creek Canyon.

BNSF 8195 (ES44AC) muscles a freight towards the Rainbow Cut which is just north of the Plainview crossing.

BNSF 9125 (SD70ACe) leads two other motors and a long freight up to Tunnel 1 at Plainview, Colorado on the Moffat Tunnel line.