R15b Calpera - Pian d'Arla
The route starts from the crossroads with the R15 at Alpe Calpera, descends to the Rio Scarnasca and crosses it on an ancient bridge, passes near the Gesola, from Corte Sceglu, Alpe Scarnasca, to finally reach Pian d'Arla.

R15b Calpera - Pian d'Arla