The attendance at the 2015 Breeders' Cup set a record for the Keeneland race course. Over two days, total attendance was 95,102. Attendance on Friday, October 30, at 44,947, was the highest for a Friday since the Breeders' Cup became a two-day event in 2007. It also broke Keeneland's previous one-day record of 40,617, set in 2012. The attendance on Saturday was 50,155. While the total attendance figure over two days was not a Breeders' Cup record, the Keeneland facility received high marks for its facilities.
While the total parimutuel wagering handle was comparable to other years, at $150,574,656, the figures for bets at the Keeneland track itself were higher than the handle in the previous year when the Breeders' Cup was at Santa Anita Racetrack. Wagering on all races Friday, including the six non-Breeders' Cup races held earlier in the day was $44,949,165 total, 1.9% lower than in 2014, but with $7,550,279 of that bet at Keeneland, which was an 8% increase for betting on-site.
Each day's program included several undercard stakes races. Friday had 10 races total, four of which were Breeders' Cup championships. The most-anticipated race on Friday was the Breeders' Cup Distaff for fillies and mares, won by the four-year-old campaigner, Stopchargingmaria. Saturday hosted 12 races, nine of which were part of the Breeders' Cup program, including the Breeders' Cup Turf, which drew the British-bred Epsom Derby and Prix de l'Arc de Triomphe winner Golden Horn and the much-anticipated Breeders' Cup Classic, where American Pharoah would challenge older horses for the first time in his career. For both horses, their contests would be the last time each would race before being retired to stud. Golden Horn struggled with the sand-based turf course and was second to the Irish filly Found. American Pharoah, coming off of a defeat in his previous race and a two-month layoff, led wire-to-wire in the Classic and won by 6 1⁄2 lengths, becoming the first horse to win the "Grand Slam" of the Triple Crown plus the Classic. With his win, he also broke the Keeneland track record for the 1 1⁄4 miles (2.0 km) distance.