The lower entrance (avenc de la Bargadèra) is 2.5x2.5 metres and leads to a gallery with a steep incline. On the right-hand side of a narrow passage a strong draught indicates the continuation. One follows a gallery until after about 50 metres a narrow joint is reached where a strong draught blows; once past this point we find the link of the system by means of an E-11 metres that climbs up towards the upper entrance or else a pit of -26 metres to continue descending the system. The access through the upper entrance (horat des Lòses), which had to be dug open, begins with a pit of 11 metres, continuing through a series of drops, short galleries and an 8-metre climb until reaching the pou de Sant Joan with a vertical drop of -49 metres; at its base, 25x15 metres and very steep, we find a branch towards the W with no continuation, which allows us to reach -106 metres. If we continue towards the E we will reach the point of the junction with the part of the avenc de la Bargadèra that was already known. From here we again find short pits and drops, passing through the Gran Xemeneia (E+59) to continue through the Galeries Superiors, where a new access with a P-11 allows access as far as the entrance of the avenc de la Bargadèra, avoiding the initial narrow passages. The system continues deepening with a pit of -26 metres divided into two sections, followed by another P-13, some drops and a P-16 (Pou de la Pasterada), a new drop and a P-20 that places us at -270 metres relative to the upper entrance; at this point we find some galleries with two parallel pits of -33 m and -36 m respectively, the latter being the Pou de les llastres. Then a straight joint with a steep incline and various narrow passages and a drop of about 7 metres place us in the Pou del Bivac of -16 metres. From here the meander zone must be overcome, where we find the Pas del Bloc, which was the end of exploration in 1987, and a few metres further on the exploration ended in 2005. The cave continues with a series of small pits until reaching the -450 m level, where we find a P-23, followed by a P-19 (Pou del Marbre), a new drop places us in the last pit of -45 metres, new drops allow us to reach -571 metres where for the moment the exploration of the system has been considered finished.

It seems proven that the outflow of the waters of the system takes place, totally or partially, through the Surgència de Lastoar (Naut Aran).