The American Quarter Horse was developed originally in the early days of the American colonies.  They were ideal working ranch horses. This breed is a descendant of the Thoroughbred stallion.  This is the only breed that is said to be calm even when not working no matter how great the commotion.

Generally, Quarter Horses have an excellent temperament and are very intelligent. They are quite calm and reliable. These horses are ideal for western riding and are fast, well-balanced, and very maneuverable.  This horses' muscular hindquarters and legs help them sprint quickly, turn, and stop.  The American Quarter horse is the oldest and the most popular of the American breeds.

The American Quarter horse is permissible in almost any plain color.  Their head is small with a broad forehead, wide jaw, and large expressive eyes. This horses' withers are discernible but in particular the rear legs are strongly muscular.  The Quarter horse isn't very big, being 14.3-15.1 hands and 1100-1300 lb.