Panoramic views of the South
The Castellaccio trail starts by the jetty on the concrete road towards the prison of Fornelli. This path is named after the ruined medieval castle overlooking most of the island and the Strait of Fornelli.
After the prison, the road winds gently uphill among abandoned prison administration buildings, such as sentry boxes, old sports facilities, accommodation for supervisors, laundry and drinking troughs.
About two kilometres from the trailhead, on the hill which offers a scenic view on Cala Reale, follow the direction to the castle: turn left onto an old mule track.
You will find a clearing with a natural spring after one kilometre among large euphorbia shrubs and thorny broom. The uphill trail becomes more demanding but also very pleasant, and you may well encounter wild goats and herds of mouflons. A half-hour climb from the spring leads to the ruins of the castle, where the view stretches from the Strait of Fornelli to Isola Piana, Stintino and the whole Nurra peninsula. On a clear day, you can also see the defence towers built during the Saracen raids. Retrace your steps back to Fornelli.
Length: 8,5 km out and back
Duration: 2 hours 40 minutes out and back
Elevation gain: 201 m
The trail is partly suitable for cycling.
Start from the jetty of Fornelli on the northbound road.