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.

Powered by a pair of EMD SD70Ms, a westbound Union Pacific freight growls upgrade on Peru Hill west of Green River, Wyoming, on October 9, 2015.

As they wait for a signal across the BNSF diamond, the conductor on UP SD70M 4073 washes the windows on the unit.

After waiting for 218 to pass them at Townwood, 10E is back on the move at Shawtown led by a UP SD70M.