A single Union Pacific SD70M leads an officer's special as it races to Denver in advance of developing storm clouds.

UP 4404 (SD70M) leaves storm clouds behind as it runs towards Denver, Colorado with an officer's special passenger train.

Denver Rock Island Railroad #1083 (SW1500) pulls a cut of cars across the road in the industrial area known as The Stockyards.

A WWII Sherman tank watches over the Denver Rock Island Railroad's SW1500 as it heads back to their shop in central Denver, Colorado.

A nice variety of motors occupy the Union Pacific's North Yard in Denver, Colorado.

BNSF 6928 (ES44C4) runs south on the Joint Line with a stack train destined for Texas.

Its late in the evening as BNSF 6382 (ES44AC) leads a loaded coal train through Greenland, Colorado.

UP 700 (GP38N) works the North Yard in Denver, Colorado during a heavy snow storm.

UP 4404 (SD70M) leads an officer's train over a bridge at Strassburg, Colorado.

The Polar Express is one of the Colorado Railroad Museum's most popular events, allowing guests to live out the scenes depicted in the book and movie. In this long exposure, D&RGW 491 hauls a pack... (more)

Storm clouds chase UP 4404 (SD70M) as it leads an officer's train over a long trestle at Peoria, Colorado.

Heavy snow is falling fast as light power works the Union Pacific's North Yard in Denver, Colorado.

Amtrak engine #11 (P42DC) kicks up the snow as it leads the California Zephyr towards the east portal of the Moffat Tunnel.

BNSF 6382 (ES44AC) leads a load of coal south on the Joint Line through Castle Rock, Colorado.

BNSF Executive 9709 (SD70MAC) brings a freight into the BNSF yard in Golden, Colorado.