Some of the day’s last sunlight tickles high points of the landscape surrounding Azure, Colorado, on Union Pacific’s Moffat Tunnel Subdivision on November 15, 2021, as an eastbound UP coal loa... (more)

A CWEMS9 coal train approaches Inspiration Point on its way upgrade with the mid and rear DPUs visible in the background.

Amtrak 5 winds along a narrow shelf in Gore Canyon

The westbound Rocky Mountaineer Railtours passenger train is exiting Tunnel 39 in Little Gore Canyon on Union Pacific’s Moffat Tunnel Subdivision on September 15, 2021.

Amtrak’s California Zephyr has just finished passing through 100-foot Tunnel 38 just east of Azure, Colorado, as it follows the Colorado River westbound through Gore Canyon on September 15, 2021... (more)

Amtrak’s westbound California Zephyr curves through 100-foot Tunnel 38 just east of Azure, Colorado, as it follows the Colorado River through craggy Gore Canyon on September 15, 2021.

Rocky Mountaineer’s “Rockies to the Red Rocks” Colorado and Utah excursion train threads 63-foot Tunnel 40 in the heart of Little Gore Canyon between Azure and Radium, Colorado, on a beautif... (more)

Amtrak’s westbound California Zephyr curves through Tunnel 40 as seen from the rim of Little Gore Canyon between Azure and Radium, Colorado, on August 21, 2014.

Following the Colorado River westbound, Amtrak’s California Zephyr pierces Tunnel 40 in scenic Little Gore Canyon west of Azure, Colorado, on August 21, 2014.

A westbound BNSF intermodal train snakes its way near the Colorado River between Azure and Radium, Colorado, on August 20, 2019.

Running westbound on Rio Grande’s Moffat Tunnel route, a quartet of EMD F40PH locomotives pull a seventeen-car Amtrak California Zephyr westbound through Tunnel 38 in spectacular Gore Canyon nea... (more)

Dwarfed in the grandeur of the Rocky Mountains, an eastbound BNSF trackage rights train snakes its way through Azure, Colorado. Recent winter storms have blanketed the Western Slope with a fresh l... (more)

A Union Pacific coal train is eastbound in Little Gore Canyon east of Azure, Colorado, on June 6, 2013. The train is exiting 63-foot Tunnel 40, the shortest tunnel on UP’s Moffat Tunnel Subdivis... (more)

A Union Pacific officers special creeps out of tunnel 39 into Little Gore Canyon on its way to Grand Junction.

Amtrak’s eastbound California Zephyr is dexiting 63-foot-long Tunnel 40 in scenic Little Gore Canyon west of Azure, Colorado, on June 3, 2013. Almost lost in the craggy scene on the far left, fi... (more)