Retracing the trail 401, this time uphill, we arrive at the junction with trail 406 (location -Su Punteddu- and continue on 401 heading south towards the locality of Tuones. From this place, we navigate the switchbacks of Iscala ‘e Pradu which lead us to Corrasi (the highest peak of Supramonte, 1463 m above sea level). Crossing Corrasi towards S-SE, with the village of Orgosolo in the background, we encounter the junction of trail 404 coming from Iscala ‘e Marras. We continue on trail 402, still heading S-SE, to reach Iscala ‘e s’Arenargiu, near which there is a small natural arch from which we can overlook (we are at 1113 m above sea level) the valley below. Leaving the junction leading to Punta Solitta on our left, we head south towards Punta Sa Pruna, 1389 m above sea level and Punta Lolloine, 1351 m above sea level (Supramonte of Orgosolo). After Fruncu sos Cuzos, 1367 m above sea level, the descent begins towards the settlement of Ottulu. During the descent, over a kilometer from Fruncu sos Cuzos, we find the Nurra (cavern) de Adarre (N40.15564° E9.42790°). From Ottulu, it is easy to reach the planned stop at cuile Sa Sinipida, currently usable as a bivouac with a spring nearby. For assistance, it is necessary to contact Efisio Manca at cell. 3202745951.