It starts from the church of San Quirico (Ardauli) and, in its entirety, continues to Sorradile. The segment in highlight connects San Quirico to the bridge of the SP15 (less than 80 meters of dirt road that is not practicable by road bike. The road is paved, practicable but bumpy at times. No longer in use, nature has partly recovered its due. Very rare are the machines, to which access is theoretically forbidden. Pay attention when traveling.