The start is from a wide hairpin turn to the left on the Gavia country road SP29 just before the Ponte dell'Alpe notice board with map and indications sign Way n. 519 2290 m, where you take the dirt road to the right. You begin the rather challenging climb up to Passo dell'Alpe 2460 m. The two tracks sign Way n. 519 coming down from Rifugio Sunny Valley 2640 m situated under Costa Sobretta join from the right here on the Pass, close to the finish line of Santa Caterina Valfurva ski runs. From here on the descent begins: on a trail at first and then on a dirt road passing past Clevaccio mountain huts 2140 m and after some steep switchbacks through the middle flat part of the valley in San Bernardo. Rifugio La Baita is here at 1860 m above the little church. The steep dirt road continues to the car park in Fontanaccia 1500 m, where the paved stretch begins heading for Fumero 1450 m and then straight for the valley bottom in Le Prese 950 m. This route can be run backwards too start ing from Le Prese towards Santa Caterina Valfurva, and becoming in this way physically more demanding.