1
From the centre of the village of Saint-Martin-en-Vercors (alt. 753m) follow the yellow and red markings of the GRP, taking the D103 carefully towards the south (cars arrive quickly without much visibility).
2
At the war memorial, leave the D103 and take the small road on the right. Follow it to the place called Les Menuisiers (alt. 755m).
3
Continue along the tarmac road and pass the cemetery. The road becomes a track and winds above the houses to reach the hamlet of Les Revoux (alt. 744m). Cross the road and continue straight ahead along the path to the junction at L' Ale (alt. 734m).
4
Turn left and head down a small descent that soon joins the D103. Follow it to the right for 200m (be careful!) to reach a small bridge.
5
Turn left, cross the bridge over the Buyèche stream, and continue along the edge of the meadow to Les Coinchettes (762m). Here, you can shorten the walk by turning left. To continue the route, turn right and begin a steep descent to quickly reach the hamlet of Tourtre (711m). Since the 16th century, this hamlet has processed iron ore to produce metal. The hydraulic power provided by the waters of the Adouin River was used by numerous industries, such as silk mills and sawmills.
6
Head up to the village center, now following the yellow and green markers. Reach the highest house at L' Apparition (750m altitude). Continue along the paved road to reach the Source de l'Adouin (810m altitude).
7
After the springs, the small road passes between two houses and then becomes a track. Continue along this path, which gently leads back to Saint-Martin-en-Vercors.
8
Find a small road at Les Coinchettes (alt. 762m), follow it to the right until you reach the houses of L' Arenier (alt. 765m). Descend to the left towards the village.
9
Pass through Les Junchards (alt. 727m) before going back up to the village square of Saint-Martin-en-Vercors.

















