Start at the Rifugio Citell car park (S) at an altitude of 1750 m.
Head north on the slightly downhill road for 1.5 km to reach the beginning of Sentier Natura (sign at an altitude of 1667 m).
Shortly after the start of the trail, take the left branch that will take us back to the right branch. After the volcanic mounds visible on the right, after about 20 minutes of walking, arrive at an old barn.
(1) Then turn right (north-east). Then fork right (south-east) to pass over a lava flow.
(2) Continue south-east and climb over one rise. Head back down towards the road.
Explore the summits of Sartorius mountains in passing: they are positioned a bit like a buttonhole.