Two Union Pacific ES44AC's lead the westbound Phippsburg, Colo., manifest through the gorgeous canyon between Tolland and Rollinsville along South Boulder Creek on May 26, 2015.

Summer is just right around the corner, as seen here in the beautiful canyon east of Tolland. Here, Union Pacific's North Yard (Denver), Colo., to Phippsburg, Colo., manifest led by ES44AC no. 751... (more)