- Departure: Casere Grisol de Dentro
- Arrival: Rifugio Sommariva al Pramperet
- Difficulty Level: E – Hiking (level)
Access trail with a stretch within the Park.
Well-marked hiking trail.
Initial stretch on a forest road and short stretch with difficult and equipped lay-out (Pissandol).
Localities crossed: Val Costa dei Nass – Casera di Pramperet.
Altimetry: 700 – 1,857.
Connections with C.A.I. trails: 521, 523, 543, 514.