Starting point is from Brenna, on path 402, leaving the small church and the cemetery on your right. Enter the natural reserve Alto Merse, where a track begins. Then go along the millrace that powered the mills, and after that, to the river Merse, and the ditch Ricausa. Along the uphill stream there are ruins of an old mill, and from there take the path on the right that goes up to Castiglion Balzetti. From Castiglion Balzetti continue on the path from the clearing at the castle. After 600 meters you will reach a junction, with a track that comes from Spannocchia. Here, turn right where path 405 starts and you will come to the road connecting Stigliano to the farmhouse Campalfi. Turn left uphill in direction of Stigliano for 50 meters, then turn right and take the road into the forest, go uphill 600 meters until you reach the Viali di Stigliano, where there are some beautiful cypress lined aisles. At the end of these aisles there are fields. Turn right and follow another aisle of oak trees. At the end of them you will reach Montestigliano. Here path 405 starts, which takes you just above the village of Brenna, where there is a beautiful view. After 500 meters you will come back to your starting point.