The Arabian Reining Horse Association (ARHA) was founded in 1998 to promote the natural athletic abilities and versatility of the Arabians and Half Arabian horses. Through the efforts of amateur competitor Robb Walther of Sherwood, Oregon and one of the founders of the ARHA, the group became affiliated with the National Reining Horse Association (NRHA) in its infancy.
The ARHA Board is made up of nine members: seven elected members, the past President, and the Treasurer (paid position).. Elections are held every December and each term is 2 years. Officers are elected at the first meeting of the calendar year.