Here are some links to on-line directories of web sites for model railroads, clubs, and retailers.

Rail Serve

RailServe.com is a leading provider of rail information services, including the world’s largest and most popular online rail directory. Acclaimed by newspapers, magazines, books, radio, and numerous online publications; linked to from more than 50,000 web sites around the world; serving more than 4,000,000 visitors per year (see details) – RailServe.com is the premier source for rail travel, hobby, and industry.