Park at Place de l'Isère below the Salle des Fêtes in Châteauneuf-sur-Isère.
(S/E) From the car park, head back up towards the Salle des Fêtes and the D67. At the roundabout, turn left and look for a pedestrian crossing a few metres further on. Turn right to cross the road and head towards the Saint-Hugues Church. Walk along the right-hand side of the church until you see the Chapelle du Tiers Ordre chapel next to it. Continue along Rue des Crozes (D101) on the left-hand pavement until you reach number 195.
(1) Cross the road (with caution) and join the pavement opposite (rubbish bins and sign for Le Télégraphe - Table d'Orientation). Turn right into the car park before building no. 224 and drive through it. At the end of the car park, follow the path furthest to the right into the forest. It quickly climbs up a sunken lane. This comes out onto a tarmac road.
(2) Cross the road and take the path opposite (wooden barrier and Zone Natura 2000 sign). Follow the path, which alternates between flat sections and gentle climbs. Walk alongside an orchard until you reach the Deveys pumping station. Continue slightly to the right on the tarmac to reach the Télégraphe signpost and the orientation table on your left (beautiful views of the Vercors).
(3) With your back to the orientation table, return to the signpost and descend to the left onto the road towards Place des Pierres via Les Réalières. At the next crossroads, turn left for about 600 metres until you reach a major crossroads on the edge of the D101.
(4) Turn right and cross the road with great caution (busy section). Continue straight ahead on the path that veers to the right above the road. Further on, walk along an orchard and then pass the farm buildings to arrive at a small paved road. Follow this road to the left, which descends to a crossroads (before the first house in the housing estate).
(5) Turn right and follow Rue Traversante. Ignore a path on the right and left (not visible on the map) and continue in the same direction. At the next junction, ignore the paths on either side and continue for a few metres until you reach the end of the small orchard.
(6) Leave the asphalt and turn left onto the path. It slopes to the right and ends at a vineyard. Turn left/right to pass between the vineyard (on your right) and an orchard (on your left). At the end of the plantations, the path branches off to the left, descending into the woods and becoming very stony. About 200 metres further down, when the woods thin out (100 metres before you reach a road), look for a path on the left.
Leave the path and turn left onto this ascending trail. Be careful, as this trail is used by mountain bikes and it is not always possible to move out of the way due to the vegetation. Further up, cross a trail at a small jump (not marked on the map) and continue until you reach a clearing.
Continue along the path on the left and then, 50 metres further on, turn left again. Climb uphill, which is quite steep in places, go around a man-made bump and you will come to a fork just before you reach the plateau. Turn right to reach a meadow.
(7) Continue right along the meadow and the edge of the woods until you reach a road. Turn left/right and follow an orchard (on your left). At the end of the orchard, the trail branches off to the right into the woods and quickly arrives at a beautiful viewpoint over the Isère River. Follow the trail downhill until you reach the hollow of a hill.
(8) Follow the path on the right which climbs steeply (leave the path on the left for the return journey). You will soon reach a flat area with a cross. Pass to the left of the cross and follow the path downhill to arrive just above the village, which offers beautiful views (be careful of the unprotected cliffs!).
It is not possible to return directly to the village, so turn around and climb back up to the cross. Go past it and descend into the hollow.
(8) Turn right onto the path and follow a few steps to reach the Place des Pierres signpost.
Turn right onto the pavement and, after passing the roundabout, turn right onto Rue des Remparts.
At the next fork, turn right onto Rue du Château with its semi-troglodyte dwellings. When you reach the Chapelle Saint-Hugues, go around it on the left until you reach a viewpoint. Turn left and go down the steps to Rue des Remparts.
Follow it to the right, then right again to pass in front of the town hall. Continue straight ahead at the next crossroads and go to the post office. Turn left onto the pavement of Route des Beaumes (D67) until you reach Saint-Hugues Church. Turn right onto the pedestrian crossing you took on the way there, then left along the same route to the car park (S/E).