The trail leaves from the panoramic road climbing from Spello and follows the western slope of Mt. Subasio.
It crosses Fosso Renaro and passes near an abandoned quarry rich in fossils.
It reaches the abandoned town of Gabbiano Vecchio and Sermattei spring, situated along the dirt road leading downhill to the town.
From here it climbs to Sasso Rosso, from where you can continue along trail 54.
Texts and photos taken from "Parco del Monte Subasio", Quattroemme, Perugia 2006. All rights reserved.