Del Mar Races Opening Day 2025. One of thoroughbred racing’s most prestigious international events, the breeders’ cup world championships will be hosted by the del mar thoroughbred club over two days beginning on oct. The del mar thoroughbred club 2023 summer racing season will run friday, july 21st through sunday, september 10th.

1 at the del mar racetrack. With an official ticket package from breeders’ cup experiences, you’ll receive.