Cimarrón Uruguayo

Dog breed · Uruguay

English name: Uruguayan Cimarrón

Overview

The Cimarrón Uruguayo (Uruguayan Cimarrón) is a breed of molosser-type dog originating in Uruguay.

Other names by which it is known in English are Cimarrón, Cimarrón Creole, Cimarrón Dog, Maroon Dog, Cerro Largo Dog, Uruguayan Gaucho Dog, Perro Cimarrón, possibly others. The breed is officially recognised in Uruguay and by the Fédération Cynologique Internationale with the name Cimarrón Uruguayo.

Temperament

Temperament: The breed standard states that the dog should have great courage. As with all large dogs, the Cimarrón Uruguayo must be well socialized when very young if it is to be safely kept as a companion. It is a very friendly dog with children and other animals.

The Cimarrón Uruguayo is sometimes used for guarding, hunting, and all dog sports in its native Uruguay. Being a very smart dog it has been used for all kinds of jobs, such as rescue or herding.

It is a rather calm and stable dog and doesn't usually bark unless a threat is real.

Appearance

Appearance: The Cimarrón Uruguayo is large in size, compact and muscular. The coat is short and usually brindle but may be a pale yellow ("bayo"), with a black face. Height of males at the withers is from 58 to 61 cm (23 to 24 in) and weight is from 38 to [dose — ask your vet] (84 to 99 lb). Adult females are slightly smaller.

Health

Health: The Cimarrón Uruguayo should be tested for hip and elbow dysplasia before breeding.

Often the ears are cropped short when the dogs are very young. This is alleged to be in homage to the days when they were hunted (the ears were presented for the bounty). Most fighting dog breeds have their ears cropped.

History

History: The Cimarrón Uruguayo mainly descends from the Alano Español and other European dogs brought by early colonizers and released or abandoned. The dogs adapted to living in the wild in Uruguay and in time became numerous. In the eighteenth century, attacks on livestock and even humans resulted in the dogs being hunted, with bounties paid by the government for each dog killed. However, many remained, especially in the highlands of Cerro Largo. Ranchers in the area would capture and tame the dogs, using them as guard dogs.

The Cimarrón's survival story and fierceness has made it something of a national symbol in Uruguay and the breed is the mascot of the National Army of Uruguay.

The Kennel Club Uruguayo (Uruguayan national kennel club) recognised the Cimarrón Uruguayo after some twenty years of work by fanciers and breeders in documenting the breed. In addition, genetic studies are being done on the breed by the Universidad de la Republica Oriental del Uruguay college of Veterinary Medicine.

Every pet is one of a kind. This guide covers what's typical for the breed, but your own dog or cat will have their own personality, quirks and needs — think of it as a friendly starting point, not the final word. Whenever you'd like advice tailored to your companion, the team at OC Pets is always happy to help.
Sources (reused under open licences, with thanks): Wikipedia — “Cimarrón Uruguayo” (CC BY-SA 4.0) · Wikidata (CC0) · image (CC BY-SA 2.0, via Wikimedia Commons) · Compiled by OC Pets Veterinary Clinic, updated 15-06-2026.