Itinerary : Staring from Grenoble's station, go under the railway to reach the Avenue de Vizille. Rejoin the Catane Bridge, taking the Cours Jean Jaurès for a few metres, the rue Irvoy, the rue Veyrat and the rue Docteur Calmette. Go across the Drac then take the cycle road southward, along the river up to the footbrige. Cross the river a second time, then follow the cycle road up to the shopping centre of Comboire. Rejoin the cours Jean Jaurès then go down it up to the Drac, at Pont-de-Claix. The Lesdiguières bridge will be to your right (possibility to access to the top of the bridge). Be careful not to ride on the way reserved to public transports, all along the cours Jean Jaurès. Use the sidepaths instead.