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From Miribel-les-Échelles, reached from Les Échelles or Saint Laurent-du-Pont, take the Route des 1000 Martyrs (CD 38, towards Saint-Geoire-en-Valdaine) and after 1 km, take the road on the left that climbs towards a campsite (Les Balcons de Chartreuse). Park in the car park at the crossroads of forest roads at an altitude of 695m.
(S/E) First take the road (Chemin du Nezet) which, after the bend, climbs northwards and, before it descends again, turn left to climb into the forest. The path curves westwards to climb straight up the moderate slope, runs along the edge of the woods and passes in front of a quarry.
(1) At the first crossroads, pass close to the Croix de Tempêtat a few metres to the right, then further up, you can see the Domen de l'Antillière on the right and, 20 metres below, the Pierre à Sacrifices. Return to continue climbing through the woods.
The path veers slightly to the right and then levels out.
(2) As you approach the edge of the woods, take a flat path on the left that skirts around the fields, staying under cover. Continue straight ahead, ignoring the forest paths coming from the left, to climb up to a road leading to the Michallat farm.
(3) Take this road on the left (Chemin de Marfay), which is level, then curves to the right to climb the slope, passes the Michallat farm and joins a path coming from the left on the plateau.
Turn right to follow the road back to the D28, close to the Col des Mille Martyrs.
(4) Turn left onto the D28 (Route du Col), pass the pass and descend 200 metres to the west. You will reach a crossroads where a path branches off to the left towards the Col du Pilori. Take this path, which curves south-west, passes the Croix des Mille Martyrs at the edge of a clearing and then continues more or less level through the undergrowth, below a wooded ridge.
Towards the end of this route, the path climbs slightly to pass Col du Pilori on the left.
(5) Pass the pass, ignore the paths coming from the right and begin the descent along the edge of a meadow offering unobstructed views, via hairpin bends leading to a farm (La Côte) on the small Montagne road.
Take this road on the left, slightly downhill, to another farm at a place called La Montagne. Turn right onto a path alongside the buildings.
This path soon descends steeply into the forest to a crossroads at an altitude of 772m.
(6) Then take a 4x4 track on the left which climbs up to a house in the middle of grassy slopes (a place called Les Brosses). Go around it on the left and continue climbing up a path which soon enters the forest again. It then levels out: continue more or less level, avoiding a climb on the left. You will gradually pass from the Saint-Aupre Forest to the Rocharey State Forest.
Leave the first paths or trails, which are more or less marked, descend to the right to reach a crossroads where it is impossible to go straight ahead. Turn right to descend the good but rough forest path to the turning platform of a stony forest road.
(7) Take this good forest road on the left (called Chemin du Pourcy or Chemin de la Forêt depending on the map). It climbs slightly for 1 km until you reach a major crossroads where it turns right and descends under the name Chemin des Grangettes.
(8) You can make a round trip via a forest track on the right to see the small Écuelle spring against the rocks on the right of this path.
Continue down the forest road and, after several paths branching off to the right, take the one that descends to the right (signposted) to visit the Oratoire de la Séverine.
From the entrance to the Oratory, continue downhill towards the north-east until you reach a clearing with a small road (Chemin de Manjotier) leading up from the right. Turn left to return to the starting point (S/E).
, the detour around the house (to the left as indicated) is confusing: until you are almost in front of the house, it seems as if the path ends there. In fact, the path to take is right next to the building.
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