Charging hard around the curve of Brighton, UP 4014 heads north along the Greeley Sub, towards Cheyenne, with a nine car passenger special.

UP's Big Boy steam locomotive #4014 leads a nine passenger special from Denver, CO back to the Big Boy's home of Cheyenne, WY as it passes through Platteville.

Union Pacific Big Boy 4014 (4-8-8-4) makes its way through the Cheyenne, Wyoming yard towards the depot, where it will lash up with the passenger cars for the run to Denver, Colorado.

Videographer Bruce Brackley has a front row seat as Big Boy UP 4014 (4-8-8-4) runs through Speer, Wyoming on its way to Denver., Colorado.

The South Platte River is running high and fast as massive rainstorms over the last few days has put the river at capacity. Here we see the Union Pacific's Big Boy 4014 running over the bridge at... (more)

Union Pacific's Big Boy locomotive #4014 (4-8-8-4) runs past a crowd of amazed onlookers at Nunn, Colorado.

UP Big Boy 4014 runs through the cut at Speer, Wyoming as it begins the journey towards Denver, Colorado where it was displayed for a day at Denver's Union Station.

Ed Dickens, Union Pacific Engineer and Senior Manager of Heritage Operations for Union Pacific Railroad, works in his office on UP Big Boy 4014 as it runs through the clouds in Cheyenne, Wyoming. ... (more)

The UP 4014 backs into Denver Union Station. Steve Lundt photo

The UP 4014 leads the 2022 Museum Special over Sand Creek just moments before ducking under the I-270 overpass in Commerce City, Colorado.

Masters of their craft. The California Zephyr made a stop in Denver, Colorado right after the Union Pacific's Big Boy locomotive backed into Union Station. Gary Meyer on left is the engineer of ... (more)

There was a rare sight in downtown Denver this weekend as Union Pacific Big Boy 4014 (4-8-8-4) backed a special passenger train into Union Station in downtown Denver, Colorado

Engineer Ed Dickens moves the Big Boy in the Union Pacific Yard in Cheyenne, Wyoming.

Union Pacific's Big Boy has just spun around on the wye and is headed towards the Moffatt Subdivision to spend the night with Denver's skyline standing tall behind them.

Union Pacific's Big Boy beats across the diamond and Sand Creek in Commerce City as they approach Denver.