On the morning of the Bicentennial of the United States of America, the Rio Grande Zephyr heads east into Spanish Fork Canyon during its journey from Salt Lake City to Denver.

An EMD SD70AH leads a 70 car North Platte to West Colton manifest freight through Lake Point on June 24, 2016. A second SD70AH is shoving on the rear of the train as a distributed power unit.

Photographed minutes after sundown, Union Pacific's Long Beach to Global 3 intermodal descends Erda Hill on the historic Los Angeles & Salt Lake Route.

Union Pacific's Los Angeles to Global One Z-train navigates a curve east of Erda on June 24, 2016.

A weathered 'Kodachrome' painted SD45R pulls Southern Pacific's Roper to Grand Junction manifest freight, approaching the mouth of Spanish Fork Canyon on Sept. 19, 1993.

Utah Railway's Provo to Ogden turn, the RUT611 local, rolls west through Murray at Vine Street on a warm June 21, 2016 evening.

Rio Grande SD40T-2s No. 5345, 5401, and 5360 switch the inbound Dirt Train at Helper Yard on July 22, 1999. The small red roofed building to the right served as a waiting room with a phone for rea... (more)

A manifest freight lead by a GP30, an SD45, and two GP35s head west through Detour in Spanish Fork Canyon on June 12, 1977.

A well tuned quartet of F40PH engines pull the California Zephyr train No. 6 less than 10 minutes from its scheduled stop at Provo, Utah on May 15, 1989.

The Ringling Brothers and Barnum & Bailey circus train glides through Leamington Canyon on June 14, 2016. The 59 car special was traveling between Colorado Springs, Colorado and Las Vegas, Nevada.

The Ringling Brothers and Barnum & Bailey circus train passes the Ash Grove Cement Plant in Leamington Canyon on June 14, 2016. The 59 car special was traveling between Colorado Springs, Colorado ... (more)

The Ringling Brothers and Barnum & Bailey circus train crests 5032 ft. York Summit near Santaquin on June 14, 2016. The 59 car special was traveling between Colorado Springs, Colorado and Las Vega... (more)

Chicago & North Western engines pull Union Pacific's APLA5 stack train through Erda, Utah on Sept. 24, 1995. Promontory Point, Antelope Island, and the Great Salt Lake are in background on this be... (more)

The Ringling Brothers and Barnum & Bailey circus train crests 7440 ft. Soldier Summit on June 14, 2016. The 59 car special was traveling between Colorado Springs and Las Vegas via the Rio Grande f... (more)

The Ringling Brothers and Barnum & Bailey circus train travels west along the Price River west of Kyune on June 14, 2016. The 59 car special was traveling between Colorado Springs and Las Vegas vi... (more)