This course is very demanding as much on the difference in level as on the regular sequence of very technical parts. Some stretches will make it possible to revive. The runners will take the wild valley of Andrable passing by the jump of the Bezan before arriving at the lava flow of Bourrianne which must be climbed in the middle then to the medieval castle of Chalencon. There are four refueling points on the route, which offer a total positive drop of +3,100 meters. The companions can find the GPS coordinates on the site of the TTT as well as those places where it is possible to see the runners pass.