International Six Days Enduro (ISDE) is the oldest 'off road' motorcycle event on the FIM Calendar.
The ISDE was first held in 1913 at Carlisle, England. It has occurred annually, apart from interruptions due to World War I and World War II, at various locations throughout the world. The early events were a true test of machine, rider skill, and reliability. Held on the 'roads' of that era, today most of the routes are truly 'off road'. Originally titled the International Six Day Trial, since 1980 it has been called the 'ISD Enduro'.
Up until 1973 the contest was always held in Europe. In 1973 it travelled for its first overseas jaunt the United States. Since then it has been outside Europe more frequently: twice in Australia (1992 and 1998), once more in the USA (1994), Brazil (2003), New Zealand in 2006 and Chile in 2007.