No special access issues
Park at the big parking of Roche aux sabots. Follow the path Chemin de la saussaye passing roche aux Oiseaux. When coming to a Y-crossroad with chemin du mont pivot, take a right. Basically you have arrived. The first problems are 20m above this path right at this crossing. For pancras, continue for a minute or so and take a right up the 25 bosses path. Or walk via Geants where you have another very visible path going up to pancras.