Mares are female horses that are typically older than three years of age. In the horse racing industry, mares are often bred to produce foals that will hopefully become successful racehorses themselves. Mares can also be trained and raced themselves, and many have had successful careers on the track. They can be differentiated from stallions and geldings by their reproductive organs.
Some famous mares in racing history include Black Caviar, Zenyatta, and Winx. Mares can be valuable assets in the breeding and racing industries, and their performances on the track can have a significant impact on their value as breeding stock.