BNSF 7269 (ES44DC) joins a variety of BNSF motors as they wait at the engine facility in Denver, Colorado for service or assignments.

A Colorado sunrise catches RTD commuter train #4025 as it runs along the elevated track above the North Yard in Denver, Colorado.

BNSF 4064 (Dash9) sits in the yard of the engine servicing facility in downtown Denver, Colorado.

UP 7739 (ES44AC) gets ready to move a string of oil cans out of the North Yard in Denver, Colorado.

Armour Yellow engines of the Union Pacific sit in the snow as they wait for service or assignments in the North Yard in Denver, Colorado.

A set of UP motors runs through the North Yard in Denver, Colorado.

Snow, freezing temperatures and glinty golden sunrise greets the Amtrak Winter Park Express Ski Train as it runs past the North Yard in Denver, Colorado.

A golden sunset and the blue hour combine as the California Zephyr 6 train pulls into Denver, Colorado.

Dawn is breaking as the California Zephyr brings 4 engines into Denver and gets ready to back into Union Station.

UP 7388 (ES44AC) runs under a signal bridge as it heads west on the Moffat Tunnel Sub.

At he start of its day long trip from Denver to Craig, Colorado is the 2 car westbound YAMPA VALLEY MAIL, train No.9 on November 5,1961. On the point is PA 6001, sporting the single stripe PRO... (more)

A variety of Union Pacific power waits for servicing or orders in the North Yard in Denver, Colorado.

Morning Parade of Passenger Trains The Moffat Sub now carries 2 passenger trains a day each way on most days. A miracle in our time but like old times standing in the golden waves of g... (more)

The last minutes of sun at sunset cast long shadows in the Union Pacific's North Yard as UP 7026 (AC4460CW) drops off a train and heads to the fueling rack for servicing.

UP 1357 (ex Denver & Rio Grande Western GP40-2) sits next to the operations building in the Union Pacific's North Yard in Denver, Colorado.