British Classic Races contest both. The final leg is the St. Leger, held over 1 mile 6 1/2 furlongs at Doncaster and is open to both sexes. The variety of distances and racecourses faced in the Classics make them particularly challenging as a series to even the best horses. It is rare for a horse to possess both the speed and stamina to compete across all these distances, making the Triple Crown a particularly notable achievement. In fact, in the modern era, it is rare for any attempt on the Triple Crown to be made. Although the oldest race in the series, the
Classic cycle races ProTour replaced the UCI Road World Cup series (1989–2004) which contained only one-day races. Many of the classics, and all the Grand Tours, were not part of the UCI ProTour for the 2008 season because of disputes between the UCI and the ASO, which organizes the Tour de France and several other major races. Since 2009, many classic cycle races are part of the UCI World Tour. Although cycling fans and sports media eagerly use the term "classic", there is no clear consensus about what constitutes a classic cycling race. UCI, the international governing body of cycling, has no mention