Park in the hamlet of Bayssac (there is usually space at the top of the Serre hill, just after the small museum of curiosities).
(S/E) At the top of the Serre climb, turn left towards the south, keep right at the cross, and right again at the three-way junction, leaving the Chemin de la Cavalle on your left.
(1) Stay on the wide path, which passes near IGN point 261. Continue straight ahead at this crossroads; the marked path on the left will be the return route.
(2) Walk among the oak trees and limestone blocks in a karstic area, then the terrain opens up. You will arrive at a plateau with a wide view of the limestone plateau with sparse vegetation, with the waste disposal centre in the distance on the right. Keep to the right, then descend to join the wide path accessible to 4x4s, which connects Vogüé directly to the Lavilledieu craft area.
(3) Take this path on the right, then the first path on the left, and follow a relatively straight north-westerly direction. Continuing in this direction, you will reach a pass (elevation 315).
(4) Keep to the left but without going too far south: be careful, there are many paths in this area, not all of which are marked on the map. Continuing in a north-westerly direction for several hundred metres, descend into a small valley and begin a long curve to the left to go around Serre Bastel. When you reach the pass, keep to the left (red mark).
(5) You will then begin a series of gentle ascents and descents overlooking the Ardèche with views, on the right, of the entire valley between Aubenas and Saint-Sernin, and, further to the north-west, of Sainte-Marguerite and the plateau, to the west, of Tanargue, and to the south-west, of Mont Lozère. In good weather, enjoy one of the most beautiful views of the Ardèche. In winter, weather permitting, you can see vast snow-covered mountains. Keep heading south at each crossroads or three-way junction until you rejoin the wide direct path from Lavilledieu to Vogüé.
(6) Continue south until you reach Vogüé. At the three-way junction overlooking the castle, keep left.
(7) Take the climb towards the Saint-Cerice Chapel, continue along the wide path and, just after a bend to the right, take the path on the left towards the Aven de Serre Tintou. Take care when passing the karstic cave on the left at the edge of the path. Continue straight ahead.
(8) You will come to a path that crosses at almost a right angle. Continue right along the wide path that descends towards Les Chazes, where you will see a bread oven.
(9) Follow the markings on the left, stay on the right, cross the hamlet of Le Clot and rejoin the tarmac road. At the exit of the hamlet, find the markings on the left for the return to Lavilledieu.
(10) On the climb, you will see the oak trees again and, at the top, once more to the left of the path, the impressive La Baume du Bois depression.
(11) Turn right and rejoin the outward route.
(2) Take the marked path on the right, which leads back to elevation 261 at the start of the route, and then retrace your steps to your chosen car park (S/E).
