The extreme race of the Techni Trail de Tiranges takes a very demanding course because of the chain of many difficulties that takes the runners in unusual places. The start of the race is not very technical with rather rolling trails until the first refueling located at kilometer 20. The suite offers many very technical parts as well as an interesting vertical drop of + 5000 meters. A few more rolling paths will allow the runners to relaunch through the Bezan jump before arriving at the famous climb in the heart of the lava flow of Bourrianne and then the medieval castle of Chalencon. This course is aimed at experienced riders. Five refreshments will be proposed. The companions will find their GPS coordinates on the site of the TTT as well as those places where it is possible to see the courageous competitors pass.