Basic Eligibility Requirements
A horse must be a registered thoroughbred and exactly three years old to compete in the Kentucky Derby. The horse cannot be younger or older than this specific age. Every horse competing must be properly registered with The Jockey Club, the official registry for thoroughbred horses in the United States.
Qualifying Points System
The Kentucky Derby uses a points-based system to select which horses earn entry. Horses earn points by running in approved prep races held at racetracks across the country during the racing season. The races that award points include major events like the Florida Derby, Wood Memorial, and Risen Star Stakes. Points are awarded based on finishing position, with higher points for winning or placing well.
Selection Process
Only the top 20 horses with the most qualifying points earn a spot in the Kentucky Derby. If two horses are tied on points, tiebreaker rules determine which horse gets the final spot. Horses that do not earn enough points through qualifying races cannot enter, even if they are otherwise eligible.
Ownership and Nomination
The horse's owner must officially nominate the horse for the Kentucky Derby before the nomination deadline. Ownership documentation must be current and valid. The owner is responsible for all entry fees and race requirements.
Physical and Health Requirements
The horse must pass a veterinary examination and meet all health and safety standards set by the racing commission and the Kentucky Derby officials. Horses with certain injuries or health conditions may be disqualified from competition. 
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