Grade I races are the highest level of thoroughbred horse racing, showcasing the best horses, jockeys, and trainers in the sport. These races are part of the American Thoroughbred Racing system and are often featured in prestigious events like the Kentucky Derby and the Breeders' Cup. Winning a Grade I race is a significant achievement and can greatly enhance a horse's value and reputation. To qualify as a Grade I race, events must meet strict criteria set by the American Graded Stakes Committee. Factors include the quality of the horses, the race's history, and the level of competition. Grade I races typically offer the largest purses and attract significant media attention, making them a highlight of the racing calendar.