Section 5: Rules of Play
Race Conditions and the Condition Book
Each racetrack publishes a condition book describing the races offered during a meet. Every race has "conditions" that define eligibility — distance, surface, age, sex, and class restrictions, plus the weights to be carried and any allowances. Common race types include:
- Maiden races: For horses that have never won a race.
- Claiming races: Every horse is entered for a stated claiming price and may be purchased ("claimed") by an eligible licensed party before the race; this class system keeps fields competitive.
- Allowance races: Non-claiming races whose conditions grant weight allowances based on a horse's recent record.
- Handicap races: The racing secretary assigns weights intended to equalize the field's chances.
- Stakes races: The highest class, with graded stakes (Grade 1, 2, 3) representing the most prestigious events. The Kentucky Derby, Preakness, and Belmont are Grade 1 stakes.
Entries, Scratches, and the Draw
- Entries: Trainers enter eligible horses by the entry deadline. If a race draws more entries than the field limit, an "also-eligible" list is created.
- Post-position draw: Post positions are drawn at random in the presence of officials, fixing each horse's starting stall.
- Scratches: A horse may be withdrawn ("scratched") before the race for soundness, eligibility, or other reasons; the racing veterinarian may scratch a horse found unfit on examination.
- Workout requirements: Horses returning from a layoff, or those new to the gate, must record published official workouts and meet HISA requirements before they are eligible to race.
Weights and Allowances
- Each horse is assigned a weight to carry (rider plus equipment plus lead). Weight is the central handicapping lever in racing.
- Weight allowances reduce the assigned weight — for example, an apprentice-jockey allowance, or a sex allowance for fillies and mares running against males.
- The clerk of scales confirms the correct weight at weigh-out and weigh-in. Carrying materially more or less than the assigned weight can result in disqualification.
Running of the Race
- The start: When the starter is satisfied the field is loaded and standing fair, the gate is released and timing begins.
- Right of way and lanes: A horse in front may not be ridden across the path of, or interfere with, a horse it has not cleared. A jockey must maintain a straight course in the stretch unless clear, and may not cause a horse to "shift in" or "shift out" so as to impede a rival.
- Holding the line: Jockeys must make every reasonable effort to give their horse a full opportunity to win or finish as well as possible — "honest effort" is a core requirement.
- The finish: The first horse whose nose reaches the wire is the winner. Close finishes are decided by the photo-finish camera.
The Triple Crown and Major Events
The North American Triple Crown is a series of three Grade 1 stakes for three-year-old Thoroughbreds, run within roughly five weeks in the spring:
- Kentucky Derby — Churchill Downs, Louisville, Kentucky, run at 1¼ miles on the first Saturday in May. Entry is governed by a published points system that qualifies the field through designated prep races, with the field capped at 20 starters.
- Preakness Stakes — Pimlico Race Course, Baltimore, Maryland, run at 1⅜ miles, two weeks after the Derby.
- Belmont Stakes — traditionally run at 1½ miles, three weeks after the Preakness; the "Test of the Champion." When Belmont Park is unavailable the race has been hosted at alternate venues and distances.
Each Triple Crown race is run under HISA's national rules together with the host state's conditions of racing and the track's own published conditions for the event. The autumn Breeders' Cup championships and year-round graded stakes complete the sport's championship calendar.