921A (lucanian side). Clessidra Path
- Trail Conditions: On foot
- Departure: Grande Porta del Pollino (1,947m)
- Arrival: Vetta Centrale Serra delle Ciavole (2,130m)
- Difficulty Level: E+ - Hiking (level)+
- Length: 1.3 km
- Difference in height: Uphill 183m
- Minimum Altitude: 1,947m
- Maximum Altitude: 2,130m
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