The Audax Club Parisien (ACP) is a French Cyclist Touring Club. It is a non-profit voluntary association formed in Paris in 1904. It organizes long-distance rides in France. The most popular event is the Paris-Brest-Paris Randonneur, held every four years. The Audax Club Parisien is also the international reference for randonneuring and works with other randonneuring organizations worldwide through the international association Les Randonneurs Mondiaux (LRM). History April 1904 — Creation of the Brevets Audax Cyclistes In April 1904, Henri Desgrange, the editor of the French daily sports paper L’Auto, organized a 200 km Brevet from Paris to Gaillon and back, in groups led by so-called road captains in charge of maintaining an average of 18 km/h. He was inspired by Italian cyclists who attempted in June 1897 the challenge of cycling from Rome to Naples, a distance of 230 km, during daylight hours. The Italians had called their event Audax, which means, in Latin, audacious (daring), and Desgrange adopted the name. 30 November 1904 - Foundation of the Audax Club Parisien The non-profit voluntary association Audax Club Parisien is formed by a group of friends, some of whom had ridden the Brevets Audax. The purpose of the association is "to encourage the development of long-distance bicycle touring, to educate cyclists, to turn them into ardent bicycle tourists and confirmed randonneurs, and to organize excursions". The ACP registered office is located at Café du Vaudeville, 29 rue Vivienne, Paris. The birth of the club was announced in the Official Journal of the French Republic on 28 December 1904. 1906 – Organization of the Brevets Audax In 1906, Henri Desgrange entrusted the ACP with the organization of the Brevets Audax. The club then contributed for fifteen years to the prosperity of these Brevets. 1921 – The Split In 1921, two reasons are leading Henri Desgrange to withdraw the organization of the Brevets Audax from the ACP. First, when organizing the Polymultipliée de Chanteloup (a climb race, see below), the ACP forms a partnership with the paper L'Echo des Sports, a rival to Desgrange's 'L'Auto. The second reason is that the ACP road captains are accused of not having observed the 18 km/h required average during a Brevet Audax run on 10 April 1910. Following this, some road captains leave the ACP and form the Union des Audax Clubs Parisiens, known today as Union des Audax Français. That is the body that