M2 - From the picnic area of Castagna Hill (Ateleta) to path N4 - at Pietra Cernaia
- Trail Conditions: On foot
- Interest: Flora, Wildlife
- Departure: Area picnic Colle della Castagna
- Arrival: Sentiero N4 –- c/o Pietra Cernaia
- Duration: 50 minutes
- Difficulty Level: E - Hiking (level)
- Length: 2 km
- Difference in height: Uphill 200m
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