Park in the large car park on the edge of Lac de Fiancey in Saint-Égrève.
(S/E) Walk along the lake, either on the right or left, then continue along the wide path to reach the Fiancey crossroads.
(1) Turn right, walk past the castle and pass by the climbing site. After the sports field and the gymnasium, keep right on the yellow marked path. Reach the undergrowth at the crossroads of the path leading up to the Ancien Fort des Batteries. Ignore this path on the right and turn left. Reach the Champy crossroads.
(2) Turn right onto Rue de Champy and continue to the end. Turn right onto the path and continue to the waterfall.
(3) Retrace your steps along this path to the Champy crossroads.
(2) Continue straight ahead, then turn left at the next crossroads onto Rue des Brieux. Continue to the château.
(4) Continue straight ahead on Rue du Muret, then at the Chemin de Fiancey roundabout, you will quickly reach the Fiancey crossroads, which you passed on the way there.
(1) From here, retrace your steps to return to the lake car park (S/E).