The Breeders’ Cup World Championships is an yearly set of Grade I Thoroughbred horse races, operated by Breeders’ Cup Limited, a company formed in 1982. From its inception in 1984 through 2006, it turned out to be a single-day occasion; starting in 2007, it expanded into 2 days. All sites are in the USA, except in 1996, when the races were at the Woodbine Racetrack in Canada.
The presence at the Breeders’ Cup changes, depending mainly on the capacity of their host track. Santa Anita Park set the highest two-day presence figure of 118,484 at 2016.  The lowest two-day attendance was 69,584 at 2007 in Monmouth Park.  The presence typically only paths the Kentucky Derby, the Preakness Stakes and the Kentucky Oaks (and in certain years, the Belmont Stakes); for more info see American Thoroughbred Racing top Attended Events.
With the accession of three races for 2008, a total of $25.5 million was awarded over the 2 days, up from $23 million in 2007. With the following removal of two races, the purses for the remaining Seven races totaled $24.5 million in 2014, plus awards for foal and stallion nominators.  Prior to this 2016 running, the total bags were increased from $26 million to $28 million. The bag of the Classic was increased from $5 million to $6 million, and the purse of this Longines Turf was increased from $3 million to $4 million.  In 2018, complete awards and prizes were increased to over $30 million after another race, the Juvenile Turf Sprint, was inserted and the bag for the Sprint was increased to $2 million. 
Every Breeders’ Cup race gifts four Breeders’ Cup decorations to the connections of the winner and a garland of flowers draped over the withers of the horse that is winning. Most Breeders’ Cup winners will go on to win the Eclipse Award in their respective division. For example, of the eleven flat racehorse groups, seven of those Eclipse winners in 2015 had also won a Breeders’ Cup race, while three others were in the cash. 
In the 2015 list of the International Federation of Horseracing Authorities (IFHA), three Breeders’ Cup races have been ranked among the top Grade 1 races in the world: the Classic (4th), the Turf (10th) and the Mile (12th). The Distaff is ranked second among the top Grade 1 races for fillies and mares. During 2006, you will find eight races on the Breeders’ Cup card, all classified as Grade I races. In 2007, three races — the Dirt Mile, Filly and Mare Sprint, and Juvenile Turf — were inserted, all of these run the Friday before the remaining eight races. Three new races — a Turf Sprint, Juvenile Filly Turf and Marathon — were inserted for 2008.  A Juvenile Sprint was added for 2011.
The championship races in 2009 (pictured) were the next year to have a day devoted to female horses. Since 2013, the gender on the two days is mixed between races.
The order of these races on the card has changed many times throughout the event’s history, but the Turf and Classic are traditionally the last two races. The 2008 event was the first in which Day 1 of the event was committed to races for fillies and mares, together with Day 2 comprising the rest of the races. For 2009, the Marathon, open to runners of both sexes, was moved from Day 2 to be the opening race 1, but the rest of the races remained on the afternoon they were conducted in 2008. In 2011, the Marathon was moved from Day 1 to Day 2, with the Juvenile Sprint getting the first race overall (and also the only one on Day 1 open to males). The Marathon returned to Day 1 at 2012. Since 2013, the first day was no longer primarily devoted to races for fillies and mares, with all the Dirt Mile and Juvenile Turf moving to Day 1 and the Filly & Mare Sprint and Filly & Mare Turf moving to Day two.
Two other major changes were made in 2013. First, the Juvenile Sprint (on dirt) was discontinued after only two runnings. That race was widely perceived as a consolation prize for horses not great enough to operate in the Juvenile.  Second, the Ladies’ Classic returned to its original name of Distaff. Whenever the latter statement was made, Breeders’ Cup president Craig Fravel said,
We restored the Ladies’ Vintage to the original name because of feedback from our faithful fans that have a strong affinity for the Distaff. In recognition of our 30th year, the Distaff has provided us with some of racing’s most remarkable moments, personified by such outstanding thoroughbreds as Lady’s Secret, Personal Ensign, Azeri, Zenyatta, and our two-time defending winner, Royal Delta. It is a fitting tribute to bring back the title Distaff to honor the rich history of the championships. 
For 2018, the sprint race to get two-year Id was revived, currently on turf as the Juvenile Turf Sprint. According to officials, the turf races to get age-old older horses have more entries than can fit within the Breeders’ Cup limitation of 12 to 14 horses, therefore that they had to include the next turf race for two-year old horses in 5.5 or six furlongs, Based on the trac