On a boulder with an old yellow n°31, underneath the blue path, 100m past the sector Thorgal. Standing start left, traverse to the right withot the top holds and exit at a big flake, just before a tree.
From the parking lot, follow the blue path towards Trois Graines d'Éternité. After the character "D", leave the sector Thorgal on the right and continue for 100m along the blue path. The boulder is underneath on the left, 30m after a remarkable tree.