Led by lone Union Pacific GE ES44AC No. 8172, a westbound vehicle train climbs Peru Hill on the railroad’s Evanston Subdivision west of Green River, Wyoming, on the afternoon of October 9, 2015.

Curving around the rocky cliffs lining the right-of-way out of Green River, a westbound Union Pacific freight ascends Wyoming’s Peru Hill on the afternoon of October 9, 2015.

A quartet of Union Pacific GEs ease a UP freight downgrade off Peru Hill just west of Green River, Wyoming, on September 27, 2020. The two lead motors are repainted AC4400CWs, followed by a pair o... (more)

Lone GE ES44AC No. 5316 leads a westbound Union Pacific stack train out of Green River, Wyoming, after a crew change and begins its climb of Peru Hill on September 27, 2020.

Led by shiny EMD SD70ACe-T4 No. 3054, a westbound Union Pacific stack train departs Green River, Wyoming, after a crew change and begins the climb over Peru Hill on September 27, 2020.

On the morning of September 27, 2020, an eastbound Union Pacific train descends Peru Hill as it curves toward the bridge over the Green River and a crew change in the yard at Green River, Wyoming.

Union Pacific's "Snow Bus" awaits the blizzards soon to come.

Three GE AC4400CWs lead an eastbound Union Pacific unit oil train down Peru Hill west of Green River, Wyoming, on March 12, 2012, as seen through the open entrance of an abandoned gas station loca... (more)

After a crew change, a Union Pacific stack train departs Green River, Wyoming, on September 27, 2020. The westbound train is crossing the Green River as it begins the climb up Peru Hill on the rai... (more)

A westbound Union Pacific freight departs the yard at Green River, Wyoming, beginning its climb over Peru Hill on the Railroad’s Evanston Subdivision on the morning of September 27, 2020.

A westbound Union Pacific freight departs Green River, Wyoming, on September 27, 2020. The train has just departed the yard after a crew change and is crossing the Green River as it begins the cli... (more)

A westbound Union Pacific stack train enters the serpentine east end of Green River Yard, bound for a crew change, before climbing Wyoming’s Peru Hill west of town on the afternoon of September ... (more)

A pair of SD40Ns blow smoke while working the Green River yard as a westbound intermodal prepares to depart.

A westbound Union Pacific stack train, led be EMD SD70ACe-T4 No. 3054, departs Green River, Wyoming, and begins its climb of Peru Hill on September 27, 2020.

A westbound Union Pacific intermodal train departs Green River, Wyoming, after changing crews on the afternoon of March 10, 2004.