From his head to the west at the Three Powers Alps, a mountain 1940 meters high above sea level, to the mouth of the Lima Valley, the Valley has Sestaione first trend from south-west to north-east for about one third of its length, then from the north-west to south-east.
His left side, breaking away from the Alps to the west Three Powers, on the border with Lucca, is bordered to the north: from the Old Pass, Mount Tooth of the Old and Pass the Farioli, by the size of Mount Elbow, 1892 meters high above sea level, then the long ridge that descends through the Harness to the confluence of the river Sestaione in La Lima. His right side, having posted, in the west, from the Alps Three Powers, continues through the mouth of Campolino and Mount Poggione, then down through the mountain and the Aviary Pass to Mount Sentinel Calig. In the East Valley Sestaione leads in the stretch of the Valley of Lima Pistoia, almost opposite the village of Cutigliano. To the North Valley Sestaione borders first with the Val di Luce, then the Valley Scoltenna stream, a tributary of the Panaro River, a tributary of the River Po, which flows into the Adriatic Sea. Towards the south, the Valley is surrounded Sestaione first with the Valley of Fegana Lucca, and then with the middle course, in the territory of Lucca, the Lima River Valley, a tributary of the Serchio river, which flows into the Tyrrhenian Sea.
In the west, the territory of the Valley of Sestaione belongs to the Municipality of Abetone, in the east, where there are the villages of Pian di Novello and Plan of the Alders, the City of Cutigliano. From Alpe Three Powers to the mouth of the Lima Valley, opposite the village of Cutigliano, 637 meters above sea level, the Valley of Sestaione has a length of about 10 km and an altitude of 1303 meters. Below the average rate of about 1550 meters s.l.m. Sestaione Valley is covered by dense trees and shrubs: the essences predomimanti forest are beech and spruce, in addition, the vegetation is represented by high-altitude moorlands, with frequent pastures and rocky outcrops. Countries around the floor of the Alders and Pian di Novello there are fields and meadows.