Union Pacific No. 844 makes the curve as it enters Cheyenne during its round trip journey from Denver-Cheyenne-Denver for Cheyenne Frontier Days.

Union Pacific No. 844 passes through the fields of Colorado, just south of Greeley, on its way back to Denver.

This photo captures No. 844 leading the Cheyenne Frontier Days The Denver Post train away from the Denver Skyline to a stop in Greeley, and eventually Cheyenne, WY.

UP X844 throws a large plume of smoke as it pulls a passenger special westward near North Bend, NE.

UP passenger special with X844 on the head end steam westward through Elkhorn, NE, on its way to North Platte.

Northbound Denver-Cheyenne break in run

Preparing for excursion; final run before tube failure.