The loop of the Haros, named after a tributary stream of the Saye, unfolds around the town of Saint-Yzan-de-Soudiac. The hike allows to appreciate the agricultural development (vineyard and logging) as artisanal (tile Fillon) of the municipalities of Saint Yzan and Saint Mariens. Attached to the neighboring town of Saint-Savin with the French Revolution, Saint-Yzan gained autonomy in the late nineteenth century taking advantage of the arrival of the railway that allows significant development. Saint-Yzan is then an important bifurcation on the line Paris-Bordeaux being thus directly connected to the stations of Coutras, Libourne, Blaye and Barbezieux. To the west of the town, close to the town hall and college, you will discover the small church built in the twelfth century that reflects the seniority of the parish. Remodeled in part in the 15th century, the church retains its Romanesque silhouette and some carved modillions where human and animal representations mingle. The countryside traversed on this loop offers to the contemplation a beautiful variety of landscapes where delicately alternate the vineyard, the meadows and the pine forest. From the heights of "Gourdet" or "La Valade", in Saint Mariens, we admire the breathtaking view over the valley and in good weather we can see the Pont d'Aquitaine, gateway to Bordeaux. Do not forget your binoculars!