BNSF 7561 (ES44DC) gets ready to run into the shadows at Larkspur, Colorado as it leads a freight southbound on the Joint Line.

BNSF 6292 (ES44AC) leads a freight through the rock valley of Pinecliffe, Colorado as it heads east on the Moffat Tunnel Sub.

CN's WC heritage engine heads up a string of power at Swan Landing.

Stacks head down Ash Hill behind BNSF 3835.

Eastbound Vehicles head down Ash Hill.

Barstow-Lubbock manifest traffic glides down Ash Hill behind BNSF 4287.

A Pair Of Dead SD40-2's Get Dragged Back To The Siding At Choate By A Lone CN T4 Off Of Train G834.

A westbound Union Pacific coal empty works upgrade through Big 10 Curve into Eisele (Clay), Colorado, on June 2, 2013. Down below, the rear DPU unit is about to enter the famous curve.

Powered by a trio of Canadian Pacific EMD SD40-2s in CP Rail Action red, CP’s wayfreight between Cranbrook and Golden arrives at the yard at Golden, British Columbia, on October 3, 2010.

A deep freeze along the Front Range and in the Colorado Rockies gave the crew of UP 7045 (C44ACM) an amazing show of winter. From the east portal of the Moffat Tunnel to the lower elevations of C... (more)

UP 7045 (C44ACM) leads the train from Grand Junction around the bend at Crescent, Colorado on its way to Denver. Conditions all along the Moffat Tunnel Sub were challenging due to negative temper... (more)

Amtrak engine #176 leads the California Zephyr through a winter wonderland at Plainview, Colorado created by freezing fog and snow showers. The temperature did not get above zero the entire day. ... (more)

Freezing fog and snow in Coal Creek Canyon greet the passengers and crew of the Winter Park Express Ski Train as it heads into the Colorado Rocky Mountains.

Prince George-Winnipeg train M304 speeds along the shores of Moose Lake approaching Mile 37 of CN's Albreda Sub.

Here is a unique look at the garage door that lifts up to let a train exit the east portal of the Moffat Tunnel. You can see the Winter Park Express deep inside the tunnel, and the train will soo... (more)