Pet Advisor Blog

Uruguayan Cimarron – Dog Breed Guide

Breed summary

Size: Large
Weight: 84 to 99 pounds
Height: 23 to 24 inches
Longevity: 13
Bark Tendency: Low
Aggression: Low
Compatibility to other pets: Low

Adopt an Uruguayan Cimarron, Dog Breed Guide


Uruguayan Cimarron or the Cimarrón Uruguayo got its name from the word cimarrón, which in Latin America means feral! It is also the official National Dog of Uruguay!

Official Name

Uruguayan Cimarron
This dog breed is also known to be called as the Cimarrón Uruguayo, Cimarron Uruguayen, Cimarron Creole, Maroon Dog, Cerro Largo Dog, Perro Cimarron and simply as the Cimarron Dog.


Date – 17th century
Country – Uruguay
Family / Group – Mastiff, Guardian, Mollosser

Recognized By:
Fédération Cynologique Internationale
United Kennel Club
The Kennel Club Uruguayo


The Uruguayan Cimarron or locally called Cimarrón Uruguayo is a mastiff breed that originates in Uruguay and can trace its roots during the 17th century. This was the time that Uruguay saw an influx of European colonizers. This Europeans brought dogs with them which for some reason were release and eventually abandoned to fend for themselves in the wild. These domesticated dogs turned feral but also adapted very well in this Latin American country. They adapted very well that by the 18th century, their numbers ballooned and these feral dogs eventually attacked livestock’s as well as people. The government started a bounty program to hunt down these dogs, rewarding hunters financially for every dog they kill. Surprisingly, this bounty system did not eradicate the Uruguayan Cimarron. A good number of this breed’s population thrived in the highland regions of Cerro Largo. The ranchers in this region decided to capture and tame these feral dogs instead of killing them for bounty. These ranchers saw that they show admirable traits as dependable and competent guard dogs.

This breed’s story of adaptation, survival, resilience and successfully beating the odds perfectly fits the Uruguayan peoples plight and made the breed as one of their national symbols. Its fierce and never-say-die reputation made the dog breed the top choice to be the National Army of Uruguay’s official mascot.

Two decades of re-introducing the Cimarron to domestic life and further breeding development let it to be recognized by the Uruguayan National Kennel Club. In 2006, the Fédération Cynologique Internationale provisionally recognized the Cimarron and classified it under the Molossoid breeds-Mastiff type. In the United States, it is recognized by the United Kennel Club and classified it under the Guardian group.


The Uruguayan Cimarron is a fierce, resilient, adaptable and very courageous dog. If properly socialized this once feral dog breed can be great companion pets to have. They are prized in their native country as reliable and capable guards, hunters and athletes!

Bred For

The Uruguayan Cimarron was once a feral dog that was hunted down for bounty and then caught to be domesticated once again to be used as guards, hunters, companions as well as athletes in dog trials and competitions.


Uruguayan Cimarron is a breed that will thrive in rural or suburban areas. They are dogs suited to live in homes that have a large yard. These dogs will enjoy large open spaces where they can run and move about.


Uruguayan Cimarrons have coats that will be very easy to take care. These dogs require having their coat brushed once at two times every week.


The Perro Cimarron as it is also called can be difficult to train and sometimes not possible to train altogether. The key to have these dogs well trained is a very experienced dog trainer.


The Cimarrón Uruguayo is a dog breed known to have common problems with hip and elbow dysplasia.


Uruguayan Cimarrons are naturally working dogs that will require plenty of activities to stimulate their physical and metal muscles. It will enjoy activities done with the whole family.