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5/9/2025
 
 
 
 
 
Owner: Union Pacific Railroad Company
Model:Alco 4-6-6-4Built As:UP 3985 (4-6-6-4)
Serial Number:70174Order No:S-1879
Frame Number:21X32 cylinders, 69" driversBuilt:6/1943
Notes:Challenger class 4664-4, donated to RRHMA.
Other locos with this serial:  UP 3985(4-6-6-4) CRR 676(4-6-6-4)
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UP 3985 Front shot
Title:  UP 3985 Front shot
Description: 
Photo Date:  10/8/2010  Upload Date: 2/21/2011 4:16:47 PM
Location:  Saint Louis, MO
Author:  Evan Acker
Categories:  Yard,Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  233   Comments: 0
UP 3985 sitting in downtown STL
Title:  UP 3985 sitting in downtown STL
Description: 
Photo Date:  10/8/2010  Upload Date: 2/21/2011 4:11:05 PM
Location:  Saint Louis, MO
Author:  Evan Acker
Categories:  Yard,Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  251   Comments: 0
UP 3985 on display
Title:  UP 3985 on display
Description: 
Photo Date:  10/8/2010  Upload Date: 2/21/2011 4:14:28 PM
Location:  Saint Louis, MO
Author:  Evan Acker
Categories:  Yard,Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  242   Comments: 0
UP 3985
Title:  UP 3985
Description:  No mistaking this location, with the Gateway Arch in the background.
Photo Date:  10/8/2010  Upload Date: 10/15/2010 3:35:06 PM
Location:  Saint Louis, MO
Author:  Robby Gragg
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  310   Comments: 0
UP 3985
Title:  UP 3985
Description:  The biggest operating steam engine in the world sits on display in St. Louis.
Photo Date:  10/8/2010  Upload Date: 10/15/2010 3:33:56 PM
Location:  Saint Louis, MO
Author:  Robby Gragg
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  336   Comments: 0
UP 3985
Title:  UP 3985
Description:  On display in downtown St Louis.
Photo Date:  10/8/2010  Upload Date: 10/10/2010 10:07:19 PM
Location:  Saint Louis, MO
Author:  Butch Getz
Categories:  Roster,Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  370   Comments: 0
UP 3985
Title:  UP 3985
Description:  The westbound Missouri River Eagle special sits on display in downtown St. Louis.
Photo Date:  10/8/2010  Upload Date: 11/7/2010 1:37:24 AM
Location:  Saint Louis, MO
Author:  Matthew Chapman
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  360   Comments: 0
UP 3985
Title:  UP 3985
Description:  The UP Challenger rests for the night.
Photo Date:  10/8/2010  Upload Date: 10/10/2010 12:06:47 PM
Location:  Saint Louis, MO
Author:  Matthew Chapman
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  566   Comments: 7
UP 3985
Title:  UP 3985
Description:  The UP Challenger spends the night in St. Louis under a clear sky.
Photo Date:  10/8/2010  Upload Date: 10/17/2010 9:50:44 AM
Location:  Saint Louis, MO
Author:  Matthew Chapman
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  243   Comments: 0
Fill UP
Title:  Fill UP
Description:  Fill it UP, check the oil and tires and wash the windshield
Photo Date:  10/8/2010  Upload Date: 10/30/2010 10:27:37 PM
Location:  Saint Louis, MO
Author:  David Bodkin
Categories:  Scenic,Action
Locomotives:  UP 3985(4-6-6-4)
Views:  283   Comments: 0
UP 3985
Title:  UP 3985
Description: 
Photo Date:  10/8/2010  Upload Date: 10/9/2010 7:00:43 PM
Location:  Saint Louis, MO
Author:  Bob Bober
Categories:  Roster
Locomotives:  UP 3985(4-6-6-4)
Views:  267   Comments: 0
Steam swirls in the cab of UP 3985 at idle on Display at St. Louis, Mo.
Title:  Steam swirls in the cab of UP 3985 at idle on Display at St. Louis, Mo.
Description: 
Photo Date:  10/8/2010  Upload Date: 10/9/2010 7:01:16 PM
Location:  Saint Louis, MO
Author:  Bob Bober
Categories:  InCab,Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  495   Comments: 0
UP 3985
Title:  UP 3985
Description: 
Photo Date:  10/8/2010  Upload Date: 10/9/2010 7:02:18 PM
Location:  Saint Louis, MO
Author:  Bob Bober
Categories:  Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  257   Comments: 0
UP 3985
Title:  UP 3985
Description: 
Photo Date:  10/8/2010  Upload Date: 10/9/2010 7:02:41 PM
Location:  Saint Louis, MO
Author:  Bob Bober
Categories:  Roster,Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  275   Comments: 0
Almost panoramic view of UP 3985 with the Arch and St. Louis Skyline to the east in background from Closed Compton Avenue Overpass
Title:  Almost panoramic view of UP 3985 with the Arch and St. Louis Skyline to the east in background from Closed Compton Avenue Overpass
Description: 
Photo Date:  10/8/2010  Upload Date: 10/9/2010 7:20:11 PM
Location:  Saint Louis, MO
Author:  Bob Bober
Categories:  Scenic,Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  2458   Comments: 0
UP 3985
Title:  UP 3985
Description: 
Photo Date:  10/8/2010  Upload Date: 10/9/2010 7:20:43 PM
Location:  Saint Louis, MO
Author:  Bob Bober
Categories:  Roster,Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  295   Comments: 0
UP 3985 on display with Union Pacific train CNAOV 06  Passing East
Title:  UP 3985 on display with Union Pacific train CNAOV 06 Passing East
Description: 
Photo Date:  10/8/2010  Upload Date: 10/9/2010 7:21:03 PM
Location:  Saint Louis, MO
Author:  Bob Bober
Categories:  Roster,Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  356   Comments: 0
UP 3985
Title:  UP 3985
Description: 
Photo Date:  10/8/2010  Upload Date: 10/9/2010 7:21:22 PM
Location:  Saint Louis, MO
Author:  Bob Bober
Categories:  Roster,Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  262   Comments: 0
workers making spot repairs on UP 3985 while on Display in St. Louis
Title:  workers making spot repairs on UP 3985 while on Display in St. Louis
Description: 
Photo Date:  10/8/2010  Upload Date: 10/9/2010 7:21:42 PM
Location:  Saint Louis, MO
Author:  Bob Bober
Categories:  Roster,Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  325   Comments: 0
UP 3985
Title:  UP 3985
Description: 
Photo Date:  10/8/2010  Upload Date: 10/9/2010 7:22:20 PM
Location:  Saint Louis, MO
Author:  Bob Bober
Categories:  Roster,Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  272   Comments: 0
UP 3985
Title:  UP 3985
Description: 
Photo Date:  10/8/2010  Upload Date: 10/9/2010 7:22:37 PM
Location:  Saint Louis, MO
Author:  Bob Bober
Categories:  Roster,Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  246   Comments: 0
UP 3985
Title:  UP 3985
Description: 
Photo Date:  10/8/2010  Upload Date: 10/9/2010 7:22:55 PM
Location:  Saint Louis, MO
Author:  Bob Bober
Categories:  Roster,Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  225   Comments: 0
UP 3985
Title:  UP 3985
Description: 
Photo Date:  10/8/2010  Upload Date: 10/9/2010 2:05:15 AM
Location:  Saint Louis, MO
Author:  Terry Redeker
Categories:  Roster,Night,Steam,Passenger
Locomotives:  UP 3985(4-6-6-4)
Views:  676   Comments: 2
UP 3985
Title:  UP 3985
Description: 
Photo Date:  10/8/2010  Upload Date: 10/9/2010 2:05:50 AM
Location:  Saint Louis, MO
Author:  Terry Redeker
Categories:  Roster,Night,Steam,Passenger
Locomotives:  UP 3985(4-6-6-4)
Views:  257   Comments: 0
UP 3985
Title:  UP 3985
Description:  Friday evening in St.Louis.
Photo Date:  10/8/2010  Upload Date: 10/14/2010 12:36:44 AM
Location:  Saint Louis, MO
Author:  Terry Redeker
Categories:  Roster,Yard,Steam
Locomotives:  UP 3985(4-6-6-4)
Views:  809   Comments: 0
UP 3985
Title:  UP 3985
Description:  UP 3985 rests the night away in St. Louis.
Photo Date:  10/8/2010  Upload Date: 10/12/2010 2:20:01 AM
Location:  Saint Louis, MO
Author:  Terry Redeker
Categories:  Roster,Night,Yard,Steam,Passenger
Locomotives:  UP 3985(4-6-6-4)
Views:  636   Comments: 0
UP 3985
Title:  UP 3985
Description: 
Photo Date:  10/8/2010  Upload Date: 10/26/2010 6:47:17 PM
Location:  Saint Louis, MO
Author:  Tommy Wolfe
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  399   Comments: 0
UP 3985
Title:  UP 3985
Description:  The Challenger makes a run west through Kirkwood
Photo Date:  10/9/2010  Upload Date: 10/12/2010 8:20:13 PM
Location:  Kirkwood, MO
Author:  Robby Gragg
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  451   Comments: 0
UP 3985 - Missouri River Eagle
Title:  UP 3985 - Missouri River Eagle
Description:  After a service stop in Jefferson City, UP #3985 has the Missouri River Eagle back up to speed as it rolls West through the countryside East of Elston, MO.
Photo Date:  10/9/2010  Upload Date: 10/11/2010 12:11:51 AM
Location:  Scott, MO
Author:  Alex Vaughn
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  3565   Comments: 16
Union Pacific #3985 leaving Pacific, MO amidst a huge crowd of admirers
Title:  Union Pacific #3985 leaving Pacific, MO amidst a huge crowd of admirers
Description:  The Union Pacific #3985 "Challenger" steam train is slowly getting underway as a huge crowd moves out of the way at the last minute.
Photo Date:  10/9/2010  Upload Date: 10/10/2010 1:20:30 AM
Location:  Pacific, MO
Author:  William Acord
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  390   Comments: 0
Union Pacific #3985 "Challenger" in Pacific, Missouri
Title:  Union Pacific #3985 "Challenger" in Pacific, Missouri
Description:  The Union Pacific #3985 "Challenger" leads the "Missouri River Eagle" steam train out of Pacific after a brief whistle stop. The enthusiastic crowds stood in harm's way until the very last minute!!
Photo Date:  10/9/2010  Upload Date: 10/10/2010 1:23:37 AM
Location:  Pacific, MO
Author:  William Acord
Categories:  Scenic,Steam,Passenger
Locomotives:  UP 3985(4-6-6-4)
Views:  437   Comments: 0
Challenger on Friday
Title:  Challenger on Friday
Description:  Another shot of 3985
Photo Date:  10/9/2010  Upload Date: 11/27/2010 9:20:20 PM
Location:  Saint Louis, MO
Author:  David Bodkin
Categories:  Scenic
Locomotives:  UP 3985(4-6-6-4)
Views:  251   Comments: 0
Throughbred At Speed
Title:  Throughbred At Speed
Description:  UP's magnificant 3985 at speed, headed west near Chamois. Jeff City is about 30 minutes ahead.
Photo Date:  10/9/2010  Upload Date: 10/9/2010 7:04:49 PM
Location:  Chamois, MO
Author:  Rick Morgan
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  357   Comments: 1
UP 3985
Title:  UP 3985
Description:  THE UP Challenger leads the Missouri River Eagle excursion over the tranquil Meramec River on its way to Jefferson City and Sedalia, Missouri.
Photo Date:  10/9/2010  Upload Date: 10/10/2010 12:09:31 PM
Location:  Jedburgh, MO
Author:  Matthew Chapman
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  392   Comments: 3
UP 3985
Title:  UP 3985
Description:  The Challenger parks the excursion train at Engineer Ave. in Sedalia for the night.
Photo Date:  10/9/2010  Upload Date: 1/8/2011 2:37:55 PM
Location:  Sedalia, MO
Author:  Matthew Chapman
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  317   Comments: 0
UP 3985
Title:  UP 3985
Description:  Check out the jackass on the right who stood there and stood there and stood there, getting in everyone's photos. What a complete dick.
Photo Date:  10/9/2010  Upload Date: 1/8/2011 2:47:11 PM
Location:  Sedalia, MO
Author:  Matthew Chapman
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  323   Comments: 0
UP 3985
Title:  UP 3985
Description: 
Photo Date:  10/9/2010  Upload Date: 1/8/2011 2:53:45 PM
Location:  Sedalia, MO
Author:  Matthew Chapman
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  321   Comments: 0
UP 3985
Title:  UP 3985
Description:  UP 3985
Photo Date:  10/9/2010  Upload Date: 10/9/2010 11:54:37 AM
Location:  Saint Louis, MO
Author:  Keith B
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  292   Comments: 1
UP 3985
Title:  UP 3985
Description:  UP 3985
Photo Date:  10/9/2010  Upload Date: 10/9/2010 11:54:52 AM
Location:  Saint Louis, MO
Author:  Keith B
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  358   Comments: 1
Westbound UP 3985 and The Missouri River Eagle Train
Title:  Westbound UP 3985 and The Missouri River Eagle Train
Description:  Blasting west down the UP Sedalia Sub. is the Missouri River Eagle headed for the Sedalia, Missouri Sesquicentennial later today running as UP Train SSLSD 09.
Photo Date:  10/9/2010  Upload Date: 11/10/2010 2:25:49 PM
Location:  Centertown, MO
Author:  Zach Pumphery
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  343   Comments: 0
Westbound UP 3985 and The Missouri River Eagle Train
Title:  Westbound UP 3985 and The Missouri River Eagle Train
Description:  Headed west on the UP Sedalia Sub. is the Missouri River Eagle bound for the Sedalia, Missouri Sesquicentennial later today as UP Train SSLSD 09. This might be my favorite picture of the trip.
Photo Date:  10/9/2010  Upload Date: 11/10/2010 2:25:50 PM
Location:  Tipton, MO
Author:  Zach Pumphery
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  395   Comments: 0
UP 3985
Title:  UP 3985
Description:  The Missouri River Eagle approaches the east side of Jefferson City near Militia Rd at full track speed.
Photo Date:  10/9/2010  Upload Date: 10/9/2010 7:03:38 PM
Location:  Jefferson City, MO
Author:  Gary Dyhouse
Categories:  Scenic,Steam,Passenger,Action
Locomotives:  UP 3985(4-6-6-4)
Views:  539   Comments: 1
UP 3985
Title:  UP 3985
Description:  UP 3985 strides into Jefferson City at Militia Rd.
Photo Date:  10/9/2010  Upload Date: 10/9/2010 7:04:08 PM
Location:  Jefferson City, MO
Author:  Gary Dyhouse
Categories:  Steam,Passenger,Action
Locomotives:  UP 3985(4-6-6-4)
Views:  473   Comments: 1
UP 3985
Title:  UP 3985
Description:  After a half hour stop, the engineer of 3985 has the throttle opened wide as a coal train pulls out of the yard alongside.
Photo Date:  10/9/2010  Upload Date: 10/9/2010 7:04:32 PM
Location:  Jefferson City, MO
Author:  Gary Dyhouse
Categories:  Steam,Passenger,Action
Locomotives:  UP 3985(4-6-6-4)
Views:  485   Comments: 0
UP 3985
Title:  UP 3985
Description:  It's off to the races as 3985 quickly builds up speed and leaves the state capitol behind on the way to Sedalia.
Photo Date:  10/9/2010  Upload Date: 10/9/2010 7:04:55 PM
Location:  Jefferson City, MO
Author:  Gary Dyhouse
Categories:  Steam,Passenger,Action
Locomotives:  UP 3985(4-6-6-4)
Views:  462   Comments: 0
UP 3985
Title:  UP 3985
Description:  3985 sails past the fall foliage at 60 MPH on the Sedalia Sub. I barely had time to get another shot!
Photo Date:  10/9/2010  Upload Date: 10/9/2010 7:05:34 PM
Location:  Clarksburg, MO
Author:  Gary Dyhouse
Categories:  Steam,Passenger,Action
Locomotives:  UP 3985(4-6-6-4)
Views:  488   Comments: 1
UP 3985
Title:  UP 3985
Description:  Even in the smallest towns, large crowds come out to see this magnificent locomotive sail by at 60 mph. In a flash it was gone. If you notice a bit of elevation in this shot, it is because I stood on the ladder rack of my truck. I think it added to the shot.
Photo Date:  10/9/2010  Upload Date: 10/9/2010 7:05:56 PM
Location:  Clarksburg, MO
Author:  Gary Dyhouse
Categories:  Steam,Passenger,Action
Locomotives:  UP 3985(4-6-6-4)
Views:  421   Comments: 0
UP 3985
Title:  UP 3985
Description: 
Photo Date:  10/9/2010  Upload Date: 10/9/2010 4:43:08 PM
Location:  Pacific, MO
Author:  Chris Bodkin
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  238   Comments: 0
UP 3985
Title:  UP 3985
Description: 
Photo Date:  10/9/2010  Upload Date: 10/9/2010 4:45:03 PM
Location:  Pacific, MO
Author:  Chris Bodkin
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  251   Comments: 0
UP 3985
Title:  UP 3985
Description: 
Photo Date:  10/9/2010  Upload Date: 10/10/2010 6:46:27 PM
Location:  Pacific, MO
Author:  Chris Bodkin
Categories: 
Locomotives:  UP 3985(4-6-6-4)
Views:  267   Comments: 3


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