An umbrella registry for all Colonial Spanish Horses. The HOA accepts horses from the Spanish Mustang Registry, the American Indian Horse Registry, and other strains identified as Colonial Spanish.

Information about the Sorraia Mustang and its studbook, including breed magazine. The Sorraia Horse is one of the original Iberian horses from which Colonial Spanish Horses (Mustangs) derived.

A nonprofit organization dedicated to the preservation of the horses which populated the United States in early colonial times.

Learn about the rich heritage, unique colors and markings of this fine breed.

Registy for the Kiger Mustang from Steens Mountain. Includes a newsletter, FAQ page, and online studbook.

Registry founded in 1998 for the purpose of preserving and promoting the Sulphur Springs Mustang and its domestic progeny.

One of the largest registries for Colonial Spanish horse, and some BLM mustangs and ponies. The AIHR has different categories depending on the types of horses registered.

Formed in 1998 to collect, record and preserve the pedigrees of American Mustang Horses.

Registry founded in 1988 to protect and preserve wild Kiger mustangs and the Kiger Colonial Spanish Horse in captivity.

The purpose of the association is to preserve the gene pool as found in the Pryor Mountain wild herd and to establish a Registry for the registration and preservation of the Pryor Mountain Mustangs and their progeny and, in cooperation with the Bureau of Land Management, to protect, preserve, promote, and enhance the wild herd of mustangs which currently inhabit the Pryor Mountain Wild Horse Refugee.