The Breeders' Cup Classic is a Grade I Weight for Age thoroughbred horse race for 3-year-olds and older run at a distance of on dirt. It is held annually at a different racetrack as part of the Breeders' Cup World Championships in late October or early November. All of the races to date have been held in the United States except for the 1996 edition held at Woodbine Racetrack in Toronto, Canada. The Classic is considered by many to be the premier thoroughbred horse race of the year in the U.S., although the Kentucky Derby is more widely known among casual racing fans. Once the richest race in the world, in more recent years, only the Saudi Cup, Dubai World Cup, The Everest and Prix de l'Arc de Triomphe have had consistently higher purses. Often, the winner of the Classic goes on to win U.S. Horse of the Year honors, including the four winners of the race between 2004 and 2007—respectively Ghostzapper, Saint Liam, Invasor, and Curlin. Due to the extremely high quality of horses in the event, the race is notoriously hard to predict. One notable example of an underdog winning the Classic is the victory of Arcangues in 1993. This was the biggest upset in Breeders' Cup history and his $269.20 payoff for a $2 wager remains a Breeders' Cup record. The Classic is now regarded as the fourth leg of horse racing's Grand Slam of Thoroughbred racing — the traditional Triple Crown (Kentucky Derby, Preakness Stakes, and Belmont Stakes) plus the Breeders' Cup Classic. After American Pharoah's Triple Crown win earlier in 2015, the term became popular; the colt became the first horse to ever accomplish this feat. Notable renewals 1980s The first running of the Breeders' Cup Classic in 1984 produced an exciting finish between 30–1 longshot Wild Again on the inside, Gate Dancer on the outside and favorite Slew o' Gold in between. The three battled down the stretch with Wild Again shifting his path away from the rail and Gate Dancer "lugging in" towards the rail, squeezing out Slew O' Gold. Wild Again finished a neck in front of Gate Dancer with Slew o' Gold less than a length behind. After a 10-minute stewards' inquiry, Wild Again was left in first place but Gate Dancer was disqualified to third. The 1987 renewal featured the face-off between two Kentucky Derby winners, Ferdinand and Alysheba. Ferdinand,