At the 3.7km mark, a series of hairpin bends and one uphill trajectory that is rather difficult to endure (with an inclination that reaches 10 percent.) At the halfway mark (at about 5.7km, called Maestà delle valli, at 749 mslm) the scenery opens up to a great view on the Fosso dell’Aghezzola and Lozzole valleys. The slopes do not change very much and this part of the excursion is difficult. Go back to the hairpin bends and pedal past large rock formations until reaching the 9.8 km mark. Here, you'll find a large crucifix in a rock and get a great view of the Apennines, in the direction of the Romagna region.
At this point, the most of the trek is over, however the final 900 meters are not flat. At the 10.7 km mark, there is a road sign that indicates the Sambuca Pass (1061 metres mslm). To make your way back to the start point, you can continue to the Colla Pass and from here, at Marradi, and rise again to the Valico Carnevale; from here, follow the directions to Palazzuolo sul Senio (45 km). Otherwise, head downhill to Prato all'Albero, following signs for Borgo San Lorenzo, Scarperia, Passo del Giogo and Firenzuola (a total of around 95 km).