No special access issues
Park either at isatis or Gorge du houx parking. It's about 15 minutes of a walk to approach the area. From Isatis, head towards east, and about 5 min after Cuisiniere hill you will see the boulders on your right side. From Gorge du houx, follow the big path to the west, after the junction of Route Raymond the boulders are on the right side of the road. Continue with the path until you reach your desired boulder. Follow the GPS tracks for easiest approach.