Park in the hikers’ car park on Rue Pré Boulat, next to the Parking des Gradins de Roize in Voreppe
Follow signpost no . 12, marked in yellow.
(S/E) Take the road leading down to Voreppe on the left bank of the Roize. Cross the roundabout keeping the Roize on your left, and head down to the junction with the D1075.
(1) Cross the D1075. In front of you are the remains of the blockhouses built by Italian soldiers in 1943.
Cross the bridge over the Roize and take the cycle path on the left. Follow this path, keeping the Roize on your left, to the drainage basin at the low point. Once you reach the lower section, follow the cycle path to the footbridge at the end of the pond.
(2) Go behind the barrier and continue along this unpaved, shaded path. Follow the canal embankment which collects the waters of the Roize and the Palluel. At the end of this shaded path, continue along the paved path which joins the Isère and the cycle path.
(3) When you reach the cycle path running alongside the Isère, cross it and head up to your left for about 1.8 km, between the Isère on your right and the cycle path on your left. When the path rejoins the cycle path, follow it for 200 m to the footbridge on the left.
(4) Cross the footbridge and turn immediately left until you reach the second footbridge to rejoin the path you left at the spillway.
(2) Head back up towards Voreppe, following the Roize along the path you took on the way there, until you reach the hikers’ car park (S/E).