The Sorraia Mustang is a rare strain of the Spanish Mustang, and is a pure descendant of the Sorraia horses which were brought by the Spanish conquistadores to Mexico and South America during the 16th century (for more information about Sorraia horses see the 'Sorraia' breed).

Origins:
Sorraia horses were first brought to South America by Christopher Columbus on his second voyage. During his journeys in the new continent, Columbus realized that the Sorraia horses were more suitable for the climate and environment of South America than the other Spanish horses, and therefore the Sorraia became a popular mount, as well as a pack horse, among the future waves of Spanish conquistadores.

During the Spanish colonization of Mexico, some of these Sorraia horses escaped to the wild, where they flourished thanks to their endurance and hardiness. Over the course of the next few centuries, these feral Sorraias developed into the Sorraia Mustang.

Characteristics:
Sorraia Mustangs tend to have a friendly temperament and a social attitude. They are smart, agile, and have good endurance. Some of them are also amblers.

Conformation:
The conformation of Sorraia Mustangs is similar to the conformation of their Sorraia ancestors, as is their coat color.

The head is long and has a convex profile, the neck is long and slender, the withers are prominent and connect to a straight back, the legs are long, the girth is deep, and the body is narrow.

The hair of the mane and tail is straight, and the legs are either clear from feathering or have light feathering at the back of the fetlocks.

Performance metrics:
The following are the: range, average, (SD), and MOE of performance metrics of ordered Sorraia Mustangs in Horse Isle (not bred ones). In rare cases, horses might have metrics outside of the range. Breeders can produce horses that are beyond this range.

Speed: 13.8-15.0, 14.5 (0.3), 0.05.
Sprint: 39-48, 44 (2), 0.38.

Accel: 0.88-1.04, 0.96 (0.03), 0.01.
Decel: 0.76-0.95, 0.86 (0.03), 0.01.

Jump: 4.99-5.19, 5.10 (0.04), 0.01.
Pull: 1.38-1.91, 1.66 (0.11), 0.02.

Turning: 49.18-59.75, 54.24 (2.13), 0.42.
Reverse: 2.4-3.0, 2.7 (0.1), 0.02.

Stamina: 42.67-46.43, 44.72 (0.86), 0.17.
Reaction: 0.66-0.78, 0.73 (0.02), 0.00.

Coats & Height:
Coat: black dun (grulla), bay dun (dun), or brown dun (slate grulla). The coat is always solid and lacks white markings save for an occasional star.

Height: usually 14hh to 14.3hh, but the full range is 13.3hh to 15hh.