Rio Grande EMD SD40T-2 No. 5345 leads a westbound Union Pacific manifest freight through Crescent, Colorado, on April 14, 2001.

Chicago & North Western GE AC4400CW No. 8825 leads a westbound coal empty upgrade through Crescent, Colorado, late in the afternoon of January 21, 2003.

On the morning of June 23, 2001, a summer edition of the Rio Grande Ski Train climbs the two-percent grade in “South Draw” between Tunnels 16 and 17 east of Crescent, Colorado.

A Union Pacific military train climbs westbound through the heart of the Tunnel District at South Draw just east of Crescent, Colorado, on the afternoon of June 16, 2017. The long train of militar... (more)

As the wind howls through the Rocky Mountains west of Denver, Amtrak P42DC #196 leads the new Winter Park Express west through the blowing snow at Crescent Siding on 1/8/17.

A westbound Union Pacific coal empty climbs through the Tunnel District at South Draw just east of Crescent, Colorado, on May 14, 2017. The train snakes through five tunnels at once, twisting thro... (more)

On the afternoon of June 16, 2017, a long train of military equipment from Fort Carson, near Colorado Springs, Colorado, heading to Yermo, California, is westbound on Union Pacific’s Moffat Tunn... (more)

With the Continental Divide looming above, a loaded Rio Grande coal train arcs through the long curve at Crescent, Colorado, in July 1984.

Climbing upgrade through the Tunnel District east of Crescent, Colorado, a westbound Union Pacific train blasts out of Tunnel 12 with a cloud of smoke on the afternoon of June 16, 2017. Leading th... (more)

A heavy train of military equipment from Fort Carson, near Colorado Springs, Colorado, heading to Yermo, California, is westbound on Union Pacific’s Moffat Tunnel Subdivision on June 16, 2017. I... (more)

The power on a westbound Union Pacific coal train exits Tunnel 13 in Tunnel District at South Draw just east of Crescent, Colorado, on May 14, 2017.

AMTK 406 in its CenturyLink wrap rounds the curve at Crescent Siding as the westbound Winter Park Express continues its trip up to the Winter Park Ski Resort.

Amtrak coming through the hills of Colorado.

A westbound Union Pacific coal train climbs through the tunnels at South Draw just east of Crescent, Colorado, on May 14, 2017. In this view, the train is exiting Tunnel 12, threading Tunnel Nos. ... (more)

Deep in the Tunnel District between Plainview and Crescent, Colorado, Amtrak’s eastbound California Zephyr threads through Tunnel 15 on May 14, 2017.