Park in the car park at the Village de Prelles.
(S/E) Opposite the car park, before the bridge on the right, take the narrow lane that runs along the left bank of the Gros Riou stream. Pass in front of a house; the lane becomes a footpath. You’ll come out onto a small clearing.
(1) Turn left onto the red-and-white-marked track (which forms part of the GR®653d or the Way of St James).
Stay on this track for about one kilometre before joining the D4 or Route des Traverses.
(2) Continue along this road for 200 metres, where a path begins on the right (signposted). Take this path and follow the markings. Climb gently through the woods and, after a few switchbacks, reach a large meadow just before the hamlet of Bouchier.
(3) Turn left onto a well-marked path leading to the Chapel of Saint-Hippolyte (a return trip to this chapel is well worth it).
(4) Return to the meadow at the previous crossroads.
(3) Turn left again, heading towards Bouchier, and rejoin the GR®.
(5) At the entrance to Bouchier, a signpost indicates the various directions.
Turn right towards Belle Combe, a wide track running due north to La Blétonnée and the hamlets of Le Sapet and Ratière; this track forms part of the GR®50, the Tour du Dauphiné.
You’ll reach La Blétonnée about 3 km further on, where there are several chalets to the right of the track. Stay on the track and, after the second chalet, in the bend to the left, look for a path on the right.
(6) Turn onto this path and head down into the woodland known as the Paroir.
(7) At the first junction, turn left and continue down the winding path. You’ll come to a large cairn on your left; take the path on the left, which leads onto a track. Head left and cross the Torrent du Gros Riou via the footbridge.
(8) Continue down the slope, reach the houses at the top of Prelles and return to the small clearing you passed at the start.
(1) Return to the car park via the same route as on the way there (S/E).