 | Railroad Stations of San Antonio
Historical information. Geographically located near the center of Texas, San Antonio was at one time the crossroads for several different railroads. |
 | Reading Railroad Technical and Historical Society
Railroad historical society dedicated to the preservation of the history of the Reading (RDG) Company. |
 | Richmond Fredericksburg and Potomac Historical Society
Railroad historical society devoted to the preservation of information about the Richmond Fredericksburg & Potomac (RF&P) Railroad |
 | Rio Grande Southern RR
Historical information and links about the former Rio Grande Southern narrow gauge railroad, in the south-western Colorado. Site includes timelines, remaining equipment, books and other reference information, and links to other RGS sites on the internet. |
 | Rock Island Technical Society
Non-profit corporation that preserves, distributes and publishes information about the Chicago, Rock Island and Pacific Railroad, its predecessors and affiliated companies. |
 | Rocky Mountain Rail Society
Dedicated to the preservation of Canadian National Railway steam locomotive 6060, now known as 'The Spirit of Alberta'. |
 | Rocky Mountain Railroad Club
Denver, Colorado based organization is dedicated to the preservation of historic railroad equipment, and encouraging an interest in the railroad tradition. |