This sector is the prolongation of the J.A. Martin classical area towards the East. Relatively few boulders have been opened, most of them of grade 7 on slopers. Park the car along the D63 about 700m past the parking lot of J.A. Martin and take Le Chemin de la Pente de la Garenne. For the sector of Alien, turn left at a crossing and go up the slope at a pedagogic board about the Mesolithic. Other boulders can be found on the right or near the top of the hill.