Official Sites:
Union Pacific Railroad
The official Web Site of the Union Pacific Railroad.
Union Pacific Corporation
Parent company of UPRR
Union Pacific Historical Society
Official Site of the Union Pacific Historical Society
Chicago & North Western Historical Society
Southern Pacific Historical & Technical Society
News:
TRAINS -- NewsWire
Altamont Press - Newsline
Union Pacific Railroad News
Railroad-related Magazines:
CTC Board Railroads Illustrated
Diesel Era
Extra 2200 South
Railfan & Railroad Magazine
Railpace Newsmagazine
Trains Magazine Online
Where do all those locomotives come from?
GE Transportation Systems
General Motors Locomotive Group
MotivePower Industries
A few other links:
St. Louis to Omaha on the UP
A railfan's report on a trip on the UP.
Union Pacific Photo Archives
Excellent collection of UP Roster photos
Golden Spike NHS Homepage
Where the UP and the CP met ... (Official page of the NPS)
Motive Power Review
UP rosters and more ...
RailCam
Live photos from the world-famous Tehachapi Loop
Railroad.net Yellow Pages
FRRS - Portola Railroad Museum