Car and truck racing in the United States comes in three basic varieties: Backyard bashing, where friends get together for some informal competition on an unprepared surface; Parking lot and hobby shop sponsored racing, which is semi-formalized with rules and judges, and may involve prizes and/or trophies, usually taking place on a prepared surface or track; and Official, sanctioned races where a national or international governing body oversees the rules and regulations to insure that all competitors abide by them. These sanctioned races involve trophies and national rankings, and are the types of races you would typically read about in the leading radio control magazines. They're run on the very best of tracks, with plenty of time spent preparing the track for race day.
Sanctioned races are administered by several different organizations. Below is a listing of the various model racing organizations, and a description of what their membership is all about.