2016 Breeders' Cup Challenge series

The 2016 Breeders' Cup World Championships was the 33rd edition of the premier event of the North American thoroughbred horse racing year. A total of 185 pre-entries were announced on October 26 in what was considered a highly competitive year in most divisions. The races, all of which were Grade I, took place on November 4 and 5 at Santa Anita Racetrack in Arcadia, California and were telecast by NBC. The Breeders' Cup is generally regarded as the end of the North America racing season, although a few Grade I events take place in later November and December.

The Breeders' Cup World Championships is an annual series of Grade I Thoroughbred horse races, operated by Breeders' Cup Limited, a company formed in 1982. From its inception in 1984 through 2006, it was a single-day event; starting in 2007, it expanded to two days. All sites have been in the United States, except in 1996, when the races were at the Woodbine Racetrack in Canada.

The Queen Elizabeth Stakes is an Australian Turf Club Group 1 Weight for Age Thoroughbred horse run over a distance of 2,000 metres at Randwick Racecourse, Sydney, Australia, in the autumn during the ATC Championships series. Prize money in 2013 was A$500,000 and was increased to A$4,000,000 in 2014 to become the richest race of the Sydney Autumn Carnival and as of 2018 the second richest WFA race in Australia.

Highland Reel is an Irish Thoroughbred racehorse. In a career running from June 2014 to December 2017 he raced in Ireland, Britain, France, the United States, Australia, Hong Kong and Dubai, and recorded seven victories at Group 1 or Grade 1 level in the Secretariat Stakes, Hong Kong Vase (twice), King George VI & Queen Elizabeth Stakes, Breeders' Cup Turf, Coronation Cup and Prince of Wales's Stakes. He was also placed in the Prix du Jockey Club, Cox Plate, International Stakes, Prix de l'Arc de Triomphe and Champion Stakes. He holds the record for the greatest amount of prize money earned by a racehorse trained in Europe.

Classic Empire is a retired American Thoroughbred race horse who was named the American Champion Two-Year-Old Male Horse of 2016 after winning the Breeders' Futurity Stakes and Breeders' Cup Juvenile. After several setbacks at the start of his three-year-old campaign, he won the Arkansas Derby, finished a troubled fourth in the Kentucky Derby, then second by a head in the Preakness Stakes. Classic Empire was retired due to multiple setbacks from an abscess on his right front hoof, as well as slight back problems which plagued him throughout his career. He stands stud at Ashford Stud, in Kentucky.

Exaggerator is a retired American Thoroughbred racehorse, winner of the 2016 Preakness Stakes. Racing as a two-year-old in 2015, he won three of his six starts including the Saratoga Special Stakes and the Delta Jackpot Stakes as well as finishing second in the Breeders' Futurity and fourth in the Breeders' Cup Juvenile. The following spring, he finished second in the San Vicente Stakes and third in the San Felipe Stakes before establishing himself as a contender for the 2016 Kentucky Derby with a six length win in the Santa Anita Derby. After finishing second to Nyquist in the Derby, he turned the tables to win the 2016 Preakness Stakes. He ran poorly in the Belmont Stakes but defeated Nyquist again in the Haskell Invitational. Tactically, Exaggerator was a "closer" – one who prefers to come from behind in his races.

The Gurkha is an Irish Thoroughbred racehorse. Unraced as a juvenile he made a considerable impact in the spring of 2016 by winning the Poule d'Essai des Poulains on his third appearance. He went on to finish second in the St James's Palace Stakes and the Eclipse Stakes before winning the Sussex Stakes. He underwent surgery for a displaced colon in August 2016 and was retired from racing a month later.

Keeneland Association, Inc. is an equine business based in Lexington, Kentucky. It includes two distinct divisions, the Keeneland Race Course, a Thoroughbred racing facility, and Keeneland Sales, a horse auction complex. It is also known for its reference library.

The 2015 Breeders' Cup World Championships was the 32nd edition of the thoroughbred horse racing season-ending premier event held on October 30 and 31 at Keeneland in Lexington, Kentucky. The race series, held for the first time at Keeneland, required a significant amount of preparation to transform the small, historic track into a venue capable of handling large crowds, comprising 13 championship races held over a two-day period.

The Grand Slam of Thoroughbred racing is an informal name for the Triple Crown and the Breeders' Cup Classic, the four most prominent races in American horse racing. The only horse to date to have won all four is American Pharoah, in 2015.

The 2017 Breeders' Cup World Championships was the 34th edition of the premier event of the North American thoroughbred horse racing year. The 13 races, all of which were Grade I, took place on November 3 and 4 at Del Mar Racetrack in Del Mar, California and were telecast by NBC and NBC Sports. The Breeders' Cup is generally regarded as the end of the North America racing season, although a few Grade I events take place in later November and December.

The 2018 Breeders' Cup World Championships was the 35th edition of the premier event of the North American thoroughbred horse racing year. The 14 races, all but one of which were Grade I, took place on November 2 and 3 at Churchill Downs in Louisville, Kentucky. The races were telecast by NBCSN on Friday and early Saturday, and by NBC later on Saturday. The Breeders' Cup is generally regarded as the end of the North American racing season, although a few Grade I events take place in later November and December. The event typically determines champions in many of the Eclipse Award divisions, although it was missing the likely Horse of the Year, Triple Crown champion Justify, who was retired in July.

The 2018 Breeders' Cup Classic was the 35th running of the Breeders' Cup Classic, part of the 2018 Breeders' Cup World Thoroughbred Championships program. It was run on November 3, 2018 at Churchill Downs in Louisville, Kentucky with a purse of $6,000,000. It was won by Accelerate, who earned his fifth Grade I win of the year.