A long and challenging alpine itinerary that crosses the Monte Legnone massif, connecting the Valtellina with the Valvarrone. The route follows historical mule tracks and military roads built during the First World War, immersed in a severe and spectacular alpine environment. It is designed for experienced hikers and highly trained cyclists, fully aware of the technical and physical demands of high-altitude trails.

The route starts from Delebio, ascending the Val Lesina, the first Orobic valley at the entrance to Valtellina. The climb follows forest and pasture roads as well as ancient mule tracks, passing through the hamlets of Ossiccio di Sotto, Ossiccio di Sopra, Canargo, and Piazza Calda, before continuing with long diagonals below the northern ridge of Monte Legnone. Upon reaching Corte della Galida (Pansun), the trail enters the high-altitude environment. From here, the route proceeds toward Alpe Cappello, crossing wide panoramic pastures overlooking the Orobie Alps and the Val Lesina. It then continues to Alpe Legnone, where the Rifugio Legnone (1,696 m) is located on a large grassy terrace dominated by a tall wooden cross. The refuge is a strategic hub of the itinerary: a stopover and overnight point, as well as a key junction for high-altitude connections between the Valtellina and Lake Como sides. From Rifugio Legnone, it is possible to continue toward Rifugio Scoggione, following the historical military roads that cross high pastures and slopes. This connection, adapted to facilitate MTB traffic, allows for the creation of highly scenic circular routes. From Scoggione and the Baita del Lago, the trail ascends toward Monte Colombano (2,008 m), an important natural viewpoint and junction of the military paths. Here begins the main north-to-south traverse of the Legnone massif, progressively gaining higher elevations. The route reaches the Bocchetta del Legnone (approximately 2,395 m), the highest point of the itinerary and a natural pass between Valtellina and Valvarrone. This long and demanding section is the most challenging part of the trail, with extensive exposed sectors and passages that require full attention. For MTB users, certain segments must be negotiated by pushing the bike due to trail exposure, steep gradients, and tight switchbacks. Special caution is required along the summit section, which crosses the Forcella Alta di Legnone up to the Matok del Petóo (2,305 m). From the pass, the trail descends along the southern slope toward the Valvarrone, initially technical and exposed, then gradually becoming more rideable along historical mule tracks. Passing by Rifugio Griera and crossing alpine pastures and forests, the route steadily loses altitude until reaching Provincial Road 67 and the village of Pagnona, the terminus of the main itinerary.