The Union Pacific's 4014 Big Boy engine passes a group of sunflowers as it moves out of the yard in Cheyenne, Wyoming.

Speer
Another study at the Speer tank. Flowering natural high plains botanicals add some color to the steel and iron beast

The Union Pacific did a test run of the 4014 Big Boy engine. The team ran backwards between Cheyenne and Speer, Wyoming, then reversed direction letting 4014 lead the way home.

UP 4014 was given a test run today by running backwards from Cheyenne to Speer, Wyoming, and then running forward back to the massive Yard in Cheyenne.

Overland Route Artifacts
Home turf for the Big Boy.

Master of His Vessel
All the right moves and some supporting infrastructure.

This view gives a good look at how large yet sleek the Big Boy engine is.

After spending the night in Denver UP 4014 heads back to Cheyenne, Wyoming. The massive engine waited in Platteville, Colorado for traffic to clear and then left at sunset, with the red glow from... (more)

Engineer Ed Dickens is at the controls of UP Big Boy 4014 as it heads towards Denver, Colorado during its shakedown test run. The Big Boy engine stayed the night in Denver before heading back to ... (more)

UP Big Boy 4014 runs south on the Greeley Sub through Platteville, Colorado on its shakedown trip to Denver, Colorado.

The Union Pacific's Big Boy 4014 runs through Greeley, Colorado.

Under threatening skies late in the day, UP 4014 leads a short test train at Fort Lupton, CO, on the UP Greeley Sub, July 8, 2021.

UP 4014 leads a short test train at Platteville, CO, on the UP Greeley Sub, July 8, 2021

UP 4014 leads a short test train at Peckham CO, on the UP Greeley Sub, July 8, 2021.

UP 4014 leads a short test train at Eaton, CO, on the UP Greeley Sub, July 8, 2021.