UP Big Boy locomotive #4014 (4-8-8-4) heads south on the Greeley Sub towards Denver, Colorado, where it will stay overnight before heading back to Cheyenne, Wyoming.

Union Pacific's 4014 Big Boy engine runs south on the Greeley Sub through Peckham, Colorado as it heads to Denver.

UP 4404 (SD70M) leads an officer's special towards Peckham, Colorado as it heads to Denver on the Greeley Sub.

UP 4404 (SD70M) leads an officer's special through Peckham on the Greeley Sub.

UP 8930 (SD70ACe) leads a freight from LaSalle to Peckham on the Greeley Sub.

UP 5707 (AC4400CW-CTE) runs a freight through Peckham, Colorado on its way to LaSalle.

Telegraph poles long since abandoned still line the tracks along the Greeley Sub at Peckham, Colorado.

A Union Pacific SD70M leads the local south on the Greeley Sub at Peckham, Colorado.

UP Rio Grande Heritage #1989 (SD70ACe) still looks good as it leads a freight past a silo at Peckham, Colorado on the Greeley Sub.

UP 4922 (SD70M) leads a freight towards Peckham, Colorado on the Greeley Sub.

UP 4922 (SD70M) passes the silo at Peckham, Colorado as it heads south on the Greeley Sub.

UP's "Big Boy" 4014 charges through Peckham looking quite at home against the backdrop of an aging elevator, farm equipment, and tall grass blowing in the wind on its way from Cheyenne to Denver. ... (more)

UP 9033 (SD70AH) runs past the amber grasses in Peckham, Colorado as the sun gets ready to set.

UP 8213 (ES44AC) muscles a loaded coal train north on the Greeley Sub through Peckham, Colorado.

UP 4014 leads a short test train at Peckham CO, on the UP Greeley Sub, July 8, 2021.