The stage route traverses the wide expanses of the Pian della Nana in Trentino, a large karst plateau of extraordinary beauty and geological interest. Herds of cows, horses, donkeys, sheep and goats in the wild graze these grasslands. The hike ends at the Costanzi bivouac, a small house set on a natural viewing terrace and surrounded by greenery.

Technical description:
The high-altitude trek is 9.5 km and is suitable for experienced hikers. From Cles we reach Lake Durigat (m.1869) and from there continue along the forest road that climbs to Rifugio Peller (m.1990) and then, on a flat road, to Malga Clesera (m. 1889). You then take the path that leads, with a small climb, to Salt Lake. Here we leave the marker to reach the Forcola Pass (m. 2105) a little higher up. From the Pass, descend to the Pian della Nana, to rejoin the Sentiero Alpinistico Attrezzato “Claudio Costanzi” (Equipped Mountaineering Trail), which crosses the entire Plain via the Passo della Nana (2195 m) to the eastern slope of Cima Nana. At this point, leave the Costanzi trail to reach the Selletta della Nana (m. 2530) and take the trail down to the A. Costanzi Bivouac (m. 2365).

Length: 10 km
Height difference in ascent: 837 m
Downhill elevation gain: 447 m
Highest point: 2530 m
Lowest point: 1863 m

Technical tips:
Rifugio Peller can be reached by car from Cles, Val di Non. Here there are 3 free parking lots where you can leave your car for several days. A jeep-type car or otherwise tall car is required to travel this dirt road, and no transit permits are needed.
The first parking lot is located at Lake Durigat and has a capacity of 25 parking spaces. From the parking lot, the shelter is a 10-minute walk. To reach the second parking lot, continue from here uphill to the left in the direction of Malga Tassulla until the prohibition sign: here there is another parking lot with 30 parking spaces. From the parking lot, the shelter is a 20-minute walk. The third parking lot is reached by continuing from Durigat Lake uphill to the right in the direction of Peller Refuge. Under the Riugio is a small parking lot with 10 parking spaces. From the parking lot, the shelter is a 5-minute walk. Water supplies along the way: Rifugio Peller, Malga Clesera and Bivacco Costanzi Those staying overnight at Bivacco Costanzi can ask Rifugio Peller to prepare a “packed dinner.” Alternatively, cheese can be purchased from Malga Clesera.

Municipality of departure: Cles
Starting location: Cles
Municipality of arrival: Cles
Finish location: Cles

Recommended period: April to September

Breathtaking experience for everyone who loves mountains, vertical rock, boundless grasslands and mysterious forests.
An emblematic multi-day itinerary circumnavigating the entire Brenta Dolomites group: 90 km of trails among vertiginous ferratas, wild alpine pastures and meadows, high-altitude refuges and the unmistakable rock of the Dolomites at sunset.
It is a walking route of about 90 km (plus variants) divided into 11 stages, which circumnavigates at high altitude (1400 – 2800 m asl) the entire Brenta Dolomite range.
The itinerary is modular, depending on the availability of time, in various combinations of stages, taking advantage of the variants. Some of the stages are short and therefore sum up to the same travel day.