Amtrak engine #76 (P42DC) runs through Leyden, Colorado.

BNSF 4019 (Dash 9) leans into the elevated curve in Keenesburg, Colorado.

Amtrak engine #30 (P42DC) leads the California Zephyr 5 train through Coal Creek Canyon after a heavy snow the night before.

UP 3831 (SD70M) leads a freight into the Union Pacific yard in LaSalle, Colorado.

UP 7606 (ES44AC) runs past the new fire station in Coal Creek Canyon, Colorado.

Rio Grande Southern engine #20 (4-6-0) runs the track at the Colorado Railroad Museum in Golden, Colorado.

Rio Grande Southern engine #20 (4-6-0) runs passengers around the large grounds of the Colorado Railroad Museum located in Golden, Colorado.

UP 7606 (ES44AC) runs towards Arvada, Colorado as it heads to Denver on the Moffat Tunnel Sub.

BNSF 8400 (SD70ACe) leads a coal train past the silo in Keenesburg, Colorado.

Light snow falls over Denver as the California Zephyr backs into Denver Union Station.

A team of leased PRLX SD40-2's move a stack train in the Hudson Terminal Yard in Hudson, Colorado.

UP 7606 (ES44AC) breaks into the sun as it runs through Coal Creek Canyon on the Moffat Tunnel Sub.

UP 4927 (SD70M) leads the Rocky Mountaineer passenger train through Tunnel #1 at Plainview, Colorado as it runs on the Moffat Tunnel Sub into the Colorado Rocky Mountains.

A mix of standard gauge engines and narrow gauge rolling stock sit at the Colorado Railroad Museum in Golden, Colorado.

BNSF 7678 (ES44DC) runs past the silo at Roggen, Colorado as it heads west on the Brush Sub towards Denver.