With over 1200 members, Arizona Road Racers (ARR) is the largest and oldest running club in Arizona and is one of the largest of such clubs in the USA. ARR was incorporated in November 1970 as a non-profit organization to promote running for health and fitness and is governed by a volunteer Board of Directors. ARR stages annual races of all distances, from one mile to 50 kilometers, and hosts social events for members. ARR also assists at many additional runs by providing equipment and expertise to organizations to raise funds for worthwhile projects.