Union Pacific’s MNYRO manifest freight climbs around the mouth of Coal Creek Canyon west of Clay, Colorado, on July 8, 2012. Three locomotives on the front of the train are about to enter Tunnel... (more)

Union Pacific MRONY freight passes mile 22.6 west of Clay, Colorado, after a nice snowfall on the Front Range on March 10, 2013. The power is about to cross over Blue Mountain Drive, while the rea... (more)

A westbound Union Pacific coal train climbs through Clay, Colorado, on the sunny afternoon of March 16, 2011.

Rio Grande’s westbound Railblazer piggyback train between Denver and Salt Lake City curves toward Blue Mountain Drive grade crossing west of Clay, Colorado, on the afternoon of July 9, 1989.

Amtrak No. 6, the eastbound California Zephyr, cruises downgrade through Clay, Colorado, on the afternoon of August 18, 2010. Waiting down below at Rocky siding for the passenger train’s passing... (more)

A westbound Burlington Northern Santa Fe manifest freight climbs out of Clay and crosses Blue Mountain Drive grade crossing on September 10, 2000. Three Dash 9s power the train, which is about to ... (more)

A westbound Rio Grande coal train crosses over Blue Mountain Drive on the approach to Coal Creek Canyon in July 1984. Five EMD SD40T-2 Tunnel Motors (Nos. 5358, 5367, 5402, 5379 and 5413) lead lon... (more)

A summer run of the Rio Grande Ski Train is westbound at Clay, Colorado, on July 15, 2000, with business car “Kansas” carrying the markers.

On July 1, 2012, a BNSF coal empty cruises through the curves at the mouth of Coal Creek Canyon, Colorado. These BNSF coal trains are fairly rare on the Moffat Tunnel Subdivision; this one is head... (more)

As the three middle DPUs climb toward Tunnel 1, a lone SD70ACe DPU brings up the rear of the BNSF coal empty destined for loading on the Utah Railway. A total of four GE ES44ACs and two EMD SD70AC... (more)

A westbound Burlington Northern Santa Fe steel coil train ascends the Rocky Mountains just west of Clay, Colorado, on May 15, 1998. The heavy train is pulled by four EMD SD40-2s with an added GP38... (more)

An eastbound Burlington Northern Santa Fe manifest freight encircles Big 10 Curve east of Clay, Colorado, on the beautiful afternoon of May 13, 1998. BNSF C44-9W No. 1112 leads the colorful consis... (more)

An eastbound Union Pacific coal load passes the detector at mile 22.6 west of Clay, Colorado, on October 22, 2012. The train is circling the mouth of Coal Creek Canyon on a 2% ruling grade with GE... (more)

A westbound Union Pacific coal train leaves Rocky, Colorado, and is about to enter Big 10 Curve. Up front are powering the empty train of hoppers is seven AC4400CWs, led by former C&NW 8828, now U... (more)