Depart from the town of Marradi, the native city of famed poet Dino Campana. Follow the signs to the Colla Pass; just outside of the town, after about 300 meters, turn left toward San Benedetto in Alpe, and ascend to Rio del Salto.
In the beginning, the inclination is modest but after one or so kilometres the road becomes more difficult over the next 8m; the ascent then evens out a little, allowing cyclists to admire the beautiful "Badia del Borgo" Abbey (at 2.4km) on the right.
After this trajectory, the road is characterized by high and low inclinations, however it is after the rest stop (at 4.2km) that the route becomes much more difficult. Over the next 6km the inclination remains constant (at circa 5%) and in some parts it surpasses 8%.
Luckily, the asphalt is in very good condition and there are several shaded areas. Car traffic is next to nil.