The Tour de France is an annual multiple stage bicycle race primarily held in France, while also occasionally making passes through nearby countries. The race was first organized in 1903 to increase paper sales for the magazine L'Auto; it is currently run by the Amaury Sport Organisation.
The Amaury Sport Organisation (ASO) is part of the French media group, EPA . It organises sporting events including the Tour de France, Vuelta a España and Paris–Nice professional cycle road races, and the Dakar Rally. The media group Amaury have Le Parisien and L'Équipe.
The race has been held annually since its first edition in 1903 except for when it was stopped for the two World Wars. As the Tour gained prominence and popularity the race was lengthened and its reach began to extend around the globe. Participation expanded from a primarily French field, as riders from all over the world began to participate in the race each year. The Tour is a UCI World Tour event, which means that the teams that compete in the race are mostly UCI ProTeams, with the exception of the teams that the organizers invite.
Traditionally, the race is held primarily in the month of July. While the route changes each year, the format of the race stays the same with the appearance of at least two time trials,the passage through the mountain chains of the Pyrenees and the Alps, and the finish on the Champs-Élysées.The modern editions of the Tour de France consist of 21 day-long segments (stages) over a 23-day period and cover around 3,200 kilometres . The race alternates between clockwise and anticlockwise circuits of France.The number of teams usually varies between 20 and 22, with nine riders in each.
All of the stages are timed to the finish; after finishing the riders' times are compounded with their previous stage times.The rider with the lowest aggregate time is the leader of the race and gets to don the coveted yellow jersey.