The passenger special crosses U.S. Highway 36, in the wide expanse of eastern Colorado. This locomotive is the last of the "Centennial" units still operating.

A passenger special moves through an industrial area before heading east across the prairie. This locomotive is the last of it's kind still operating.

UP's lone operating Centennial diesel has no trouble pulling this passenger special upgrade along the Colorado River.

On its way south out of Kremmling, UP 6936 had more than a few of us in hot pursuit.

UP 6936 and its special train approach Abilene, the home town of IKE.

After a quick crew change in Salina, the massive DD40X breezes through the small town of Soloman.

The special has arrived at Salina yard, and a crew change in underway. It will depart in ten minutes to continue its journey east.

A group of Union Pacific employees gather on the platform of Salt Lake City's new passenger terminal while a UTA FrontRunner commuter rail test train departs for Ogden.

A rare sight to catch this unique locomotive pulling an engineering special through the Moffat Tunnel, as a westbound manifest waits for it's turn.

A union Pacific officers special makes its way up Cuesta Grade. Here the train has cleared North Chorro, has passed through tunnel 11, and is on its way up to Serrano where it will be held for a ... (more)

Still crawling in to the Oakland Terminal, 6936 and train have just finished the long haul from West Colton.

Assigned to a system-wide inspection special for Union Pacific officials, UP 6936 powers the train up the former Southern Pacific Coast Line and across the famous Gaviota Trestle, located roughly ... (more)

UP 6936 Special pulling 12 business cars heads from Yuma to West Colton on this day. Chasing this for 60 miles was quite the joy!

A nice and clean UP special runs through El Casco, with the UP6936 leading.