If it's the breed of horse that you're referring to, it originated in the valley of the River Clyde, in southwestern Scotland. Clydesdales were probably first brought into the United States by Scottish settlers from Canada early in the 19th century. However, the earliest recorded direct importations of this breed occurred in the 1870's.
Clydesdales are not as heavy as other draft breeds, a mature stallion weighing from 1,700 to 1,900 pounds. However, they are taller and rangier, standing about 16 or 17 hands tall. No other draft breed has the Clydesdale's style and action. It has a vigorous, clean, straightforward walk and a snappy high trot. The predominant colors are bay or brown with white markings, but black, gray, and roan also occur. There is an abundance of long hair, called feathers, about the fetlock. Clydesdales are very handsome and showy, but they require much care in bad weather. Though not generally popular, they are often used in the six-horse teams that breweries maintain for shows and parades.