A wildly beautiful route that first meanders over vast grassy meadows to then wend its way along the audacious crests of the peaks of the northern chain. Dotted with quite demanding stretches which have fixed rope supports, this route requires fitness, training and the ability to deal with unpleasant surprises and danger due to changing weather conditions. However, the vastness and the variety of the views more than make up for the hard physical effort required. A little used route even in season. From the Peller Refuge go down towards the Lake Durigal car park and then walk through the Pian della Nana plain meadows. 
Go up the Sasso Rosso slope to the Prà Castron Pass (2,502 m.) where the route along the crest begins, going as far as the Bocca dei Tre Sassi pass. After the narrow “Schiena dell’Asen” (donkey’s back) crest, you go down to the Bocca del Vento pass (2,562 m.); then go around the Cima Vento and Cima Liveze peaks to the Bocchetta delle Liveze (2,720 m.), from where you climb up the Cima Rocca peak and the crest of the Cima Paradiso peak (2,835 m.). Then climb along the Cima Sassara peak which has a number of steep gorges and near which stands the Bonvecchio bivouac (2,779 m.). 
The path then crosses the Cima Sassara from the western side, goes around the Sasso Alto peak and takes you to the Gelada di Tuenno Valley pass at 2,686 metres with the help of fixed rope supports. You then go around the Corno di Flavona peak from the south-west to go down to the Bocca dei Tre Sassi pass (2,614 m.). Going down the Gelada di Campiglio Valley the route shares a stretch with path no. 334.