SEDEA - Sioux Empire Dressage and Eventing Association Web site. An English riding group serving the Sioux Falls area and eastern South Dakota. Humboldt, South Dakota.

Eastern States Dressage and Combined Training Association (ESDCTA, Inc.) is one of the largest organizations in the country for both these equestrian sports. We are a USEA affiliate, and a USDF GMO. Based in New Jersey, ESDCTA has members in Eastern Pennsylvania and the New York City area, as well.

The Mid-America Combined Training Association (MACTA) was established in 1977 to provide educational and competitive activities for its members and other horse lovers in the community. Holds educational activities and sponsor shows at Heritage Park. Granted 501 (c)(3) status under the federal codes.

The U.S. Eventing Association is committed to the development of the sport of Eventing by providing its members with competitions that are enjoyable, educational, fair and affordable. The US Eventing Association is a 501C3, not-for-profit organization, established for its educational and promotional endeavors.