Leaving via the track that runs from Campgràs toward the fondo de les Terradelles and becomes a wide path following the entire contour of the rubbish dump beside the high-tension line, you must go all the way to the end. From here a small trail follows very close to the ridge to the mouth of the pit, very close to spot height 426 (on the Alpina publisher's map it is marked as Cavall Bernat ??). This ridge is the one that separates the vall de Joan and the last outlet on the right of the Sot de l'Infern, shortly before its slope drops suddenly.