A Union Pacific “Z” train climbs Peru Hill westbound out of Green River, Wyoming, on the afternoon of October 9, 2015.

The blue flags are out as a crew prepares UP 6774, UP 6151, and KCS 4779 to head south with a loaded coal train over the KCS's Rich Mountain.

A Union Pacific grain shuttle cruises west down the Evanston Sub through Echo Canyon. On the left, the historic Lincoln Highway and on the right, a super busy Interstate 80.

A 99 car grain shuttle glides west down the Evanston Sub grade at Henefer, Utah.