Negotiating the curves entering Clay, Colorado, on the Moffat Tunnel Subdivision is an eastbound Burlington Northern Santa Fe coal train on the afternoon of July 5, 2003. The head end is already a... (more)

It is pretty rare that Union Pacific’s west local out of Denver ventures any further west than Rocky Spur, but on a snowy February 18, 2001, it made a trip upgrade. The three Rio Grande GP40-2s ... (more)

Burlington Northern Santa Fe’s MDENSTO (Denver to Stockton) manifest freight curves into the afternoon sun west of Clay, Colorado, on July 16, 2001. Delivered to BNSF from General Electric 11 mo... (more)

The Rio Grande Ski Train rounds the curve westbound out of Clay, Colorado, early on the morning of January 7, 2001. Big 10 Curve is visible on the mesa in the middle background, where the train wa... (more)

Amtrak’s eastbound California Zephyr drops downgrade through Clay, Colorado, on March 16, 2011. In the background directly above the locomotives is “Little 10 Curve,” where the train will be... (more)

A westbound Union Pacific coal empty climbs around Big 10 Curve and through Clay, Colorado, on October 23, 2011.

With a colorful locomotive consist up front, an eastbound Burlington Northern Santa Fe freight waits for a meet with the westbound Amtrak California Zephyr at Clay, Colorado, on September 6, 2001.... (more)

Leaving the Great Plains behind and climbing the foothills just west of Clay, Colorado, is a westbound Union Pacific coal empty as the sun rises high into a morning sky on January 25, 2007.

Climbing through the snow at Clay Colorado, is a Union Pacific coal train on February 10, 2001. Powering the westbound empty is a Southern Pacific AC4400CW and two UP SD9043MACs.

As the head end of westbound BNSF MDENSTO approaches Tunnel 1 in the background, two Burlington Northern EMD SD40-2s push hard on the rear of the train that just cleared Blue Mountain Drive grade ... (more)

Ansco’s Rio Grande Ski Train just met an eastbound Union Pacific coal train at Clay, Colorado, on the morning of February 10, 2001. The westbound passenger train is now back on single track west... (more)

With stormy weather over the plains and the city of Denver (visible just above the tree line on the ridge) in the background, a westbound Union Pacific manifest freight climbs out of Clay, Colorad... (more)

As rainy weather moves east over the plains, a westbound Union Pacific manifest freight curves out of Clay, Colorado, while climbing the front range of the Rocky Mountains on April 18, 2003. Leadi... (more)

A pre-Halloween blizzard in Colorado finds a westbound hi-rail inspecting Union Pacific’s Moffat Tunnel Subdivision west of Clay on October 23, 2006. The crew will soon be stopping at Blue Mount... (more)

Before the Ansco Rio Grande Ski Train bought three F40PHs from Amtrak, they leased a like number from them for a couple years. On March 5, 2000, one of the locomotives was ailing, so Union Pacific... (more)