District 36 is the AMA district that covers Northern California.
From the D36 website
District 36 Motorcycle Sports Committee, Inc.
An American Motorcyclist Association Recognized and Chartered District Organization
Founded in 1955
District 36 is a volunteer-based non-profit organization of motorcyclists and like-minded enthusiasts who organize and enhance responsible family recreation and exercise environmental conservation for the purpose of promoting today’s activities and protecting our sport for the future.
American Motorcyclist Association District 36 Motorcycle Sports Committee Corporation was founded in January 1955. Today the organization is known simply as “District 36”. The District was created to provide supervision and sanctioning for motorcycle racing in Northern California and Nevada. In that role, the District maintains a competition rule book/operations manual, points standings and provides a reliable and safe method for advancing riders from Novice to amateur and finally Expert status. In the 1950′s, motorcycle racing was all about dirt track, long before other forms of off-road racing had been invented. It was from these humble beginnings that D36 started to build its national reputation in turning out talent and sanctioning safe and competitive racing, year in and year out. Today, the District is much more than just flat track. The organization also sanctions Enduro, Cross Country and many family-oriented off-road competitive events. The organization is thousands of member families strong, and as such, is one of the largest AMA amateur districts in the United States. Our events are the largest off-road competition events in the Northern California and Nevada areas.
Right to Ride
In response to the increasing restrictions being placed on motorcyclists and riding areas, District 36 created a program called the Legislative Action Office. The role of this program is to protect rider’s rights – working with local, state and national governmental agencies, bureaucrats and elected officials. In 1988, the District made a decision to hire a full-time LAO Director dedicated to this cause. This work is funded by District 36 under the direction and guidance of the Board of Directors, with additional financial support from donations and programs approved by the Board of Directors.