ISDE

The International Six Days Enduro (ISDE) is the world’s oldest ongoing international motorcycle endurance competition. It brings together riders from national teams to compete over six days of timed enduro tests and related road sections, testing both speed and reliability. The event originated in 1913 as the International Six Days Trial in the United Kingdom and evolved into the ISDE as the sport and its regulation matured.

Format and competition structure are centered on endurance rather than straight speed. Each day includes a series of enduro tests—special timed sections held on off-road courses—along with liaison sections that require navigation and riding under varying conditions. Riders accumulate penalties for missed or late sections, and the combined times determine both individual and team classifications. The format typically features multiple classes based on motorcycle displacement and rider eligibility, with separate trophies for national teams and for individual riders in designated categories. The national teams compete for overall supremacy, while others may vie for junior or women’s classifications where offered.

Organization and hosting rotate among member nations. The event is administered by the Fédération Internationale de Motocyclisme (FIM) in cooperation with the host country’s national federation, and it draws riders from around the world. ISDE is viewed as a premier event for developing enduro skills and testing motorcycle durability and rider endurance under demanding conditions. It also serves as a platform for national federations to showcase riders and to promote the sport globally.