There's no mistaking where we are here! With the world famous St. Louis Arch in the background, UP 3985 slows to a stop west of downtown.

Union Pacific challenger #3985 heads west across the MacArthur Bridge approach.

Union Pacific #3985 pulls into Gorham Il, for a turn around and servicing..

UP 3985 leads the eastbound Missouri River Eagle.

The UP 3985 Challenger with the Circus Train on there way to Denver.

The UP 3985 Challenger sets in the yard ready to depart to meet the Circus Train for the run to Denver.

The Missouri River Eagle is departing North Platte, NE.

The 3985 gets some TLC at a service stop in Lodgepole, NE.

While the helicopter chasing the train may have challenged some taking video, it added a little something rare to those shooting photographs. I guess we may have seen it all now, lets hope this is... (more)

The Missouri River Eagle is arriving at Lodgepole for a service stop.

UP 3985 leads the Missouri River Eagle. Today's destination is Marysville, KS.

In a historical event, UP 3985 leads the circus train to Denver. Not only was this my first chance to photograph the 3985, it was also my first visit to beautiful Colorado.

UP 3985 is getting under way on the second leg of its journey. Today's destination is Marysville, KS.