UP 4404 leads the Union Pacific heritage passenger train through Sedalia, Colorado.

UP 4404 (SD70M) leads a Union Pacific special passenger train through the S curves at Monument, Colorado.

UP 5011 (SD70M) backs a consist with the UP rotary plow towards the fueling rack as they continue to prep for heading to Rawlins, Wyoming.

The Union Pacific ran a special heritage passenger train along the Colorado Front Range, from Denver to the state line with New Mexico, enabling a chase with some great background scenery. Here U... (more)

Storm clouds are moving in from the mountains on the left as UP 4404 leads a special heritage passenger train south on the Joint Line between Colorado Springs and Pueblo, Colorado.

A Union Pacific special heritage passenger train runs on the Joint Line towards Colorado Springs, Colorado.

UP 4404 (SD70M) leads a UP special heritage passenger train on the Joint Line through Monument, Colorado.

UP 4404 leads a Office Car Special heading southbound out of Palmer Lake through the twists and curves towards Monument, CO.

UP 4404 leads a pssenger special southbound at Larkspur, CO, on track #2, normally used for northbound operations. Mar 22, 2023.

UP 4404 (SD70M) as it leads a UP special heritage passenger train as it runs on the northbound track of the Joint Line. Traffic on the southbound track necessitated the switch to the northbound t... (more)

UP 4404 (SD70M) as it leads a UP special heritage passenger train as it runs south on the Joint Line at Nixon, Colorado. The vintage cars included 314 'Columbia Rivier', 5817 'Pony Express', 119 ... (more)

Storm clouds over the mountains and the morning's first sunlight catch UP 4404 (SD70M) as it leads a UP special heritage passenger train past a target signal north of Castle Rock, Colorado. The v... (more)

Engineering Special PSIDV-21 Union Pacific 4404 with 10 heritage fleet cars with the special is near Agate, CO 3/21/23.

PSIDV-21 Engineer Special PSIDV-21 Union Pacific 4404 with 10 heritage fleet cars with the maintenance special is near Sand Creek Junction, CO 3/21/23.

UP 4404 (SD70M) crosses Sand Creek in Denver, Colorado as it arrives late in the day.