On the historic circular trail in the Blenio Valley one can go on an exciting journey to the past. Along the 4.5 km long hiking path there are numerous old churches and chapels with artistic sculptures and frescoes. One of the highlights is the church of San Carlo di Negrentino on the erstwhile mule track to the Nara Pass.

Route: Acquarossa - Prugiasco - Negrentino - Nara - Leontica - Comprovasco - Acquarossa.