23 moves rallongation of Spéléologue, on the boulder of La Caverne (red n°24), underneath the plateau, in the Eastern part of the sector. Start in the cave with the neck of a big "fish head", take on the big holds of the "stalactite", climb the roof and exit in La Caverne (red n°24).
Update (August 2019) : a hold has recently broken at the exit off but the problem is still realizable with the same grade.