Leaving San Vincenzo in a southerly direction, take the Principessa road, which runs on the flat along the coast and through the Rimigliano Nature Park. After about 11km, you come out of the pinewoods at La Torraccia. A gentle climb leads to the turn off for Baratti (12km); turn right and ride first uphill and then down towards the scenic Gulf of Baratti.
Possible extension: climb up to the Populonia Fortress from Baratti Harbour: 2km uphill with some challenging bursts, but the magnificent view from the Piombino headland makes it worth the effort. With this extension, the distance is 45km with an elevation gain of 460m.