(S) Set out from the car park at the Col du Gourdon pass on the D156, below the Col de la Chaudière towards Bourdeaux.
Take the footpath due south towards Tonils, which descends parallel to the main road below it and then joins up with the road again at a hairpin bend (1).
Cross the road and go through a small gate in the fence. A sign indicates Tonils.
Follow the path until you reach a track coming up from the farm just below (2).
Ignore the marked path on the right that goes to Tonils and take the left-hand path.
Follow the relatively flat path across the mountainside which continues alongside a fence, and then at a hairpin bend you will join a track coming up from Tonils (3).
Keep following the winding track up the mountain side which leads to the pastures until you reach a shepherd’s hut (4).
Then follow the ridge northwest to the summit of the Grand Delmas (5)
To make your way back down, keeping following the ridge and then take the path down to right (6).
The steep path leads into the forest, makes a few bends, crosses a few small clearings, and then joins the main road again (7) near the Fontaine de la Sourde fountain.
Follow the road back downhill to the Col du Gourdon pass