SS. Trinità - Campo della Pietra-Fosso dei Volatri - Passo Procoio - Colle della Tagliata - SS. Trinità
- Trail Conditions: On foot
- Interest: Flora, Geology
- Departure: Piazzale SS.Trinità (1,443m)
- Duration: 3 hour/s 10 minutes
- Difficulty Level: E - Hiking (level)
- Length: 6.7 km
- Difference in height: Uphill 388m - Downhill 373m
- Minimum Altitude: 1,355m
- Maximum Altitude: 1,668m
Short itinerary leading to Fonte della Fossaiola, locally called "degli Scifi", for the presence of the traditional drinking troughs obtained from tree trunks. It also represents an alternative to the ridge itinerary on Colle della Tagliata (651), with which it can be combined to form a ring-route.