Track Three Testing newly installed PTC gear west of Cheyenne near Sherman Summit on track 3 the Harriman Cutoff.

This shot gives a good look at the 'Elephant Ears' smoke deflectors that were installed on UP Big Boy #4014 as it runs through Speer, Wyoming on its way to Denver, Colorado.

Union Pacific Big Boy #4014 (4-8-8-4) makes smoke as it heads south on the Greeley Sub towards Denver, Colorado.

Running past the silos in Platteville, CO, Union Pacific 4014 "Big Boy" continues south on July 17th's run from Cheyenne, WY, to Denver, CO.

Sand Creek Junction Tough light plagues us on this trip where Union Pacific 4014 with newly installed for this run to Denver from Cheyenne using 3985’s smoke deflectors makes an appe... (more)

UP Big Boy locomotive #4014 (4-8-8-4) heads south on the Greeley Sub towards Denver, Colorado, where it will stay overnight before heading back to Cheyenne, Wyoming.

The Union Pacific Steam Team attend to UP Big Boy locomotive #4014 (4-8-8-4) as it will soon head from Denver, Colorado to its home base in Cheyenne, Wyoming.

Smoke Deflectors A new look for the Big Boy as it carries 3985’s old smoke deflectors on a quick run to Denver on September 30.

Smoke Deflectors A new look for the Big Boy as it carries 3985’s old smoke deflectors on a quick run to Denver on September 30.

Smoke Deflectors A new look for the Big Boy as it carries 3985’s old smoke deflectors on a quick run to Denver on September 30.

Union Pacific's 4014 Big Boy engine runs south on the Greeley Sub through Peckham, Colorado as it heads to Denver.

An orange Colorado sunrise glints off the newly installed 'elephant ears' on the Union Pacific's Big Boy engine as the crew gets the mechanical marvel ready to travel to Cheyenne, Wyoming.

The Union Pacific's Big Boy engine smokes as it climbs the grade at Speer, Wyoming, while on its way to Denver, Colorado.

Union Pacific's Big Boy #4014 (4-8-8-4) sits in the UP's North Yard in Denver, Colorado. Note the addition of the 'elephant ears' on either side of the nose of the mechanical marvel.

Union Pacific's Big Boy #4014 (4-8-8-4) runs over the South Platte River in Denver, Colorado as it makes its second run of the season.