One of the walks you can do from La Vieille Grange is along the road up the hill to Chateau Fenelon, past the Auberge du Cantou (the duck restaurant and retail outlet for preserved duck products and fresh eggs). Continue past the chateau gates and follow the wall back down the hill, through woods, to Mercadiol. Once the track leaves the walls, keep taking the left fork! About 50 minutes.