When it comes to the highest level of thoroughbred racing, stallions and colts tend to dominate most top grade races. In fact, in recent years fillies and mares have largely stopped competing in open Group 1 races, and are instead preferred for filly or mare only races.<\/p>\n\n\n\n
Despite this trend, a small number of exceptional fillies and mares have not only beaten out male contenders in some of the world\u2019s most prestigious races, but have also gone on to produce the most significant achievements in the history of thoroughbred racing.<\/p>\n\n\n\n
Here\u2019s our look at the most famous filly and mare racehorses of all time.<\/p>\n\n\n\n