A must in the Pays Voironnais! The start is at the foot of the emblematic St Bruno de Voiron church, completed in 1872 and listed as a historic monument in January 2007. Attention forest work in progress from Les Grattons to the road.

The route begins to the north-west on rue des Quatre Chemins then goes straight up rue des Orphelines in the direction of the Collège de la Garenne. Under the parking lot of the Lycée de la Martellière, a conservatory orchard ensures the sustainability of old varieties of local nuts. After the small pass, the final slope leads under the shaded canopy of chestnut thickets to Notre Dame de Vouise at an altitude of 735 m. Dominating the site of Voiron, the tower with its 90 steps, supports the statue dating from 1868 and presents a panoramic orientation table on the south of the Pays Voironnais, the Chartreuse and the Vercors.