The Criollo (in Spanish), or Crioulo (in Portuguese), is the native horse of Argentina (1918), Uruguay (1923), Brazil (1932) and Paraguay. It may have the best endurance of any horse breed in the world next to the Arabian. In fact, due to the criollo’s low basal metabolism, it may be a better long-distance horse than the Arabian in prolonged races over a week in duration with no supplemental feed. The breed is most popular in its home country, and is known for its hardiness and stamina. The breed dates back to a 1535 shipment of 100 Pure Bred Spanish - Andalusian stallions coming from Cadiz, Spain, to the Rio de la Plata imported by Buenos Aires founder, Pedro de Mendoza.
In 1540, Indian hostility forced the Spaniards to abandon Buenos Aires and between 12 and 45 surviving horses were set loose. When Buenos Aires was resettled in 1580, it is estimated that the feral horse population numbered around 12,000. Since it largely reproduced in the wild, the criollo developed into an extremely hardy horse that was able to survive the extreme heat and cold, subsist with little water, and live off the dry grasses of the area. Settlers later came and started capturing horses for riding and for use as pack animals. The Native Americans had already been doing that for many years.
The criollo is a hardy horse with a brawny and strong body. They have short, strong legs with good bone, resistant joints, low-set hocks, and sound, hard feet. The long-muzzled head is medium- to large-sized and has a straight or slightly convex profile with wide-set eyes. The croup is sloping and the haunches well-muscled, the back short with a strong loin. They have sloping, strong shoulders with muscular necks. The body is deep with a broad chest and well-sprung ribs.
The criollo is tractable, intelligent, willing, and sensible. Criollo horses average 14.3 hands high. The maximum height for stallions and geldings is 15 hands high and the minimum height is 14 hands high. The maximum and minimum heights for mares are 2 cm less (approximately one inch). The line-backed dun is the most popular color, but the breed may also come in bay, brown, black, chestnut, grulla, buckskin, palomino, blue or strawberry roan, gray and overo colors.
The breed is famous for their endurance capabilities and ability to live in harsh conditions, as their homeland has both extreme heat and cold weather. They are frugal eaters, thriving on little grass. They have good resistance to disease and are long-lived.
One example of the breed's fantastic endurance was the ride made by the Swiss-born Argentine rider Professor Aimé Félix Tschiffely (1894-1954) in 1925-28. Tschiffely took two criollo’s, 16-year-old Mancha and 15-year-old Gato, on a 13,350 mile (21,500 km) trek from Buenos Aires to Washington D.C., crossing snow-capped mountains, the world's driest desert, the thickest tropical jungles and riding in all types of weather. Alternating the riding and packing between the two horses, the trio took three years to finish the trip. Although Prof. Tschiffely went through many hardships on the trip including a bout of malaria, the horses did wonderfully in the wide array of extreme topographies and climates. Gato lived to be 36, Mancha lived to be 40, living out the last years of their lives as celebrities in La estancia El Cardal (El Cardal Ranch), the breeding establishment of the man most credited for developing of the criollo breed, Dr. Emilio Solanet.
In 1987, Jorge Saenz Rosas, owner of the Argentine Estancia Cristiano Muerto, offered his criollo Sufridor to the American Louis Bruhnke and the Russian/French Vladimir Fissenko for a horseback ride from the Beagle Channel in Tierra del Fuego to the shores of the Arctic Ocean in Deadhorse, Alaska. After traveling for five and a half years, the ride was accomplished in the summer of 1993. Having made the entire journey, the Criollo Sufridor is likely the horse that has traveled the furthest in a single direction. The ride was chronicled in the book "Sufridor," written by Louis Bruhnke.