The departure is from the picnic area at the bridge over the Rio provincial Giairetto (1585) on the border between the provinces of Cuneo and Imperia.
E 'reachable by car or by Upega (3,5 km) from both Monesi through the Collection of Sauces (1623).
Here begins a forest track that dates the beautiful larch forest of Shuttles (a good path to cut a few bends). At an altitude of 1900 meters is meets a road dirt ex-military hillside Monesi-Colle di Tenda.
Follow the road to the north (right) to a few hundred meters to the point where it intersects a distinct ridge. You leave the road and climb to the left along a track (not marked) that follows the thread of this ridge in between the valleys of the Rio Giairetto (south) and the Rio Crow (north).
With smooth path you gain the ridge of watershed-Roya Tanaro (border with France) just south of the Colla Rossa. Here is uncontaminated a good trail and follow it to the south (yellow markings) just below the Top Missun which separates a small path that leads quickly to the summit cross (2356).
From Missun you follow the trail back then along this road until the Colla Rossa (2179) at the foot of Bertrand. From here there is a thin track (not marked), which initially was the thread of the ridge and then move to sull'erto grassy slope that falls in the Roya Valley. For steep green hill and rocks to finally reach the summit of Cima Bertrand (2481).
On the way back we continue north along the ridge until you reach within minutes the easy trail that descends to the right cutting along the hillside around the eastern side of the mountain (yellow markings) to the Colla Rossa. Glue to turn left on a path (not marked) that descends to the east. The trail passes next to a dilapidated hut, enter the larch forest and come out on the rolling stock Monesi-Colle di Tenda at the Poggio del Lagone (1897). Turn right and follow the dirt road for 1.5 km to the entrance of the forest track that shows the picnic area of the Giairetto.