Departure from the Saint-Même d'en Haut car park (3km from Saint-Pierre).
(S/E) Follow the marked trail that enters the cirque and climbs up the torrent (waterfalls) to Pas du Ruat (source of the Guiers Vif and cave 5 minutes away).
(1) Turn back and cross the cliff via the Pas de la Mort (difficult passage).
(2) Reach the plateau via a circular loop to the south, then take a path to the north and cross the Alpette to reach the Alpettaz and theGR®9.
(3) Head north, pass through Habert de la Dame before reaching the Pré de Pratcel meadow.
(4) Turn right and climb up to the Vallon de Pratcel.
(5) At the crossroads, continue left on theGR® to the Chalets de l'Habert de Saint-Vincent via the Pas de l'Échelle.
(6) Leave theGR® and climb right up to the Croix de l'Alpe (1,821 m).
(7) Continue to the right to return via the Col de l'Alpe.
(8) From the pass, follow the Vallon de Pratcel to the right to rejoin theGR®9.
(5) Continue straight ahead to Pré de Pratcel (1,450 m).
(4) Leave theGR® and descend straight ahead. A steep path leads down to theGR® du Tour de la Chartreuse (ruins).
(9) Turn right and walk for about 20 minutes.
(10) At the crossroads, turn left onto a path that descends to the road and the starting car park (S/E).
3.10.2023 The route is largely located on the private property of the Marquis de Quinsonas, who has prohibited access, as reported
