Park in the car park at the end of the D251. Parking fee: €5 per car.
(S/E) Return to the entrance at the large chestnut tree just before the bridge and take the Mare e Monti trail on the left (clearly marked in orange), which you will follow to Bocca di Bonassa. At the start, the trail runs alongside the stream and then crosses it just before reaching Prince Pierre's house. Ignore the other trails and follow the orange markings.
(1) Pass the ruins and, a few minutes later, ignore a path to the right, continuing leftwards uphill through the forest, which gradually thins out. Continue on the Mare e Monti. Finish the climb by zigzagging through a pine forest to reach Bocca di l'Erbaghiolu.
(2) Highest point of the hike: enjoy a beautiful view of the Gulf of Calvi in the distance. The descent begins and the path leads gently to Bocca di Bonassa.
(3) At the pass, leave the Mare e Monti and the orange markings and turn right onto the red-marked path towards Bonifatu, which you will follow until the end of the hike. The path descends and gently leads you back to your starting point.
(4) Just before the road, don't miss the fork. Turn right and quickly climb a small ridge before descending towards the stream, which you will cross to find the path you took on the way up, leading back to the starting point on the left (S/E).