The 2008 Breeders' Cup World Championships was the 25th edition of the premier event of the North American Thoroughbred horse racing year. It took place on October 24 and 25 during the Oak Tree meeting at Santa Anita Park in Arcadia, California. The Breeders' Cup is generally regarded as the end of the North America racing season, although a few Grade I events take place in later November and December. The 2008 Breeders' Cup results were influential in the Eclipse Award divisional championship voting.
The Friday racecard featured five Breeders' Cup races for fillies and mares, culminating in Zenyatta's win in the Ladies Classic. On Saturday, the European contingent won five races, capped by an upset by English-based Raven's Pass over heavy favorite Curlin in the Classic.