From the Melosa pass, follow the road as it climbs northwards for about 300 metres, and then take the bridleway that turns right up the southern slopes of Mount Grai until it meets the road again, just below the Grai hut. Turn left onto the road and follow it a short way to the Sella d'Agnaira pass, (B. Vallette, 1880m). Turn right onto the track that climbs towards the peak of Mount Pietravecchia all the way to the Valletta Pass (1909m) on the border. Follow the red and white signs of the Alta Via dei Monti Liguri trail down the French side of the border, past a rocky patch and circling Mt Pietravecchia to the west, to reach the Gola dell'Incisa pass (1684m). The trail then forks. To the left lies the Sentiero degli Alpini trail (see alternative routes). Instead, continue along the French slopes of Mount Toraggio, along a bridleway that cuts across the slope through larches. Once over the Fonte Dragurina Pass (1821m) we are in Italian territory once again. The bridleway winds dramatically through fields and rocks. It then turns westwards sharply, cutting straight across a rock face to the Gola del Corvo pass (1404m), hewn out of the rock.
From the Gola del Corvo pass the trail heads east on the Italian side of the mountain. It then forks. To the right is the Sentiero degli Alpini trail (see alternative routes). Instead, take the other fork that climbs to the Fonte Dragurina Pass. It circles Mounts Toraggio and Pietravecchia on the French side and then climbs to the Valletta Pass (1909m). The trail then descends briefly on the Italian side only to climb again towards the Grai hut. Finally take the fork on the right, a bridleway that descends to the Melosa pass.
(Regione Liguria)

The position of Mounts Toraggio and Pietravecchia, placed as they are between the Alps and the Mediterranean, means that they are blessed with a rich diversity of plant life. Mediterranean species are to be found alongside alpine varieties or even arctic plants that became established here eons ago when most of the Alps were covered by glaciers. In late spring and early summer the hills are a vision of flowering blooms. In the autumn it is the turn of the larch forests to dazzle the walker with colour. And you might just catch a breath-taking glimpse of a chamois, framed by the backdrop of the sea.
(Regione Liguria)