Cross the bridge over the Fosso di Gore and, 3km outside of Suvereto, you come to a junction (30.4km). Here you depart from the S.P. 398, which heads left, instead continuing straight on and following the signs for Massa Marittima and Montioni as you head along the S.P.19 “di Montioni”. After crossing the bridge over the River Cornia, you come to a junction where you need to bear right on the S.P. 22 “San Lorenzo-Banditelle”. After around 1.3km, you pass through the village of San Lorenzo and then past vineyards, the Petra winery and the Casalappi farm. There is a short downhill section and a noteable bend to the left where there is a crossroads (39km).
At the 4.5km mark on the S.P. 22, leave the main road and continue straight for 2km until you come to another junction. Here, turn left following a stretch of road with power lines until you come to the next junction, where you need to take the right-hand turn-off on the S.P. 21 “Campiglia Marittima-Riotorto” which heads to nearby Cafaggio (43.2km). From here, follow the signs for Campiglia Marittima (approx. 4km uphill). The road begins to climb almost immediately and, after a few bends, brings you to a T-junction. At the junction, turn right, climbing once more, towards Campiglia Marittima (47.7km). From the village, cycle downhill (approx. 6km) until you come to the flyover which crosses the S.S 1 Aurelia. Back on the S.P. 39 “Vecchia Aurelia”, bear right which quickly brings you to San Vincenzo (57.2km) and then Donoratico (65km).