This fairly challenging loop will take you through and get to know Val Cardonè and Val Lia: the two striking valleys in which Cima Piazzi, a mountain group in the Western Rhaetian Alps, located in the municipality of Valdidentro, is set.

Drive past Bormio (Sondrio) and, after about 10 kilometers, arrive at the gates of Isolaccia (municipality of Valdidentro). Before crossing the bridge over the Viola stream, however, turn left reaching the sports field, where you can park. If you buy a ticket, you can instead continue by car to the locality of Pian di Astele (1,661 m). From this point the trail begins.

Walking along a carriage road, you pass Madonna di Presedont (1,760 m), where you can see a pretty little chapel dedicated to the Madonna and the work of the Alpine troops.
At a first fork in the road, continue to the right, toward the beautiful Cardonè valley, climbing to the huts of the same name at 1,986 meters. The signs to follow are those for the Ferrario and Cantoni bivouacs.
Leaving the dense Conte forest behind you, at around 2,200 meters, the trail bends left and you will soon reach the Ferrario bivouac (2,350 m). We find ourselves in a magnificent area with breathtaking views and full of small lakes and streams fed by the melting glaciers of Cima Piazzi. Signs indicate the Cantoni bivouac, which you will reach after climbing a steep scree slope at the foot of the north face of Cima Piazzi.

After a break to regain your energy, you will take the trail again and follow an easy, well-marked ridge trail to the Lia valley and the Boron alp. A scenic traverse will give you strong emotions in this section, completely immersed in nature, and then you will definitely lose altitude until you reach the alpine pasture. Some difficulty may be encountered in crossing the stream that enters the plain at around 2,115 meters. Better to follow the signs of a path that rises on the left leading to a small bridge.

Cross the stream to reach the Boron alp (2,057 m) and the alp of the same name, a little gem in the middle of a wide pasture plain with shrub meadows, where it seems that time has stopped and where you can indulge in moments of relaxation. In about 1 hour 40 minutes you will return to the parking lot where you left your car, thus finishing this beautiful loop trail.