The route starts from the village of medieval origin Rancio Valcuvia (296 m s.l.m).
From the picnic area, at the crossroads between the SP N 62 and the Via Valganna, we set off towards the west, crossing a short stretch of wood and a meadow until you reach and pass a dirt road that goes uphill and leads to a farm. You will then come out on a hairpin bend of the SP 62 next to which, on the left, the characteristic path of the ancient cobbled street that runs for a hundred meters to the town of San Francesco, recognizable by a shrine dedicated to the Saint. The path now continues on the left, passing through a beech forest and climbing up a wooded slope in a southerly direction for a difference in height of about 150 meters.
At the end of the climb you reach Cavalitt and then comfortably in a few minutes you reach the Torbiera del Paù Majure (Great Swamp).
After passing the Torbiera, continue in a southerly direction for about two hundred meters to a crossroads with three other streets.
On the left we leave the scattered houses of Preciuso di Brinzio and continuing towards the valley on the right we go along a characteristic narrow cobbled road that after a few hundred meters joins the typical "Ur Grupp" Osteria, then we pass the stone bridge over the Rio Valmolina to reach the town of Brinzio.