Beautiful route, with wonderful views of the Valtiberina, the views on clear days range up to the Sibillini and the Gran Sasso. The only flaw is the central 2 or 3 km that I would define as gravel extreme bordering on enduro. It's a shame because from Montemercole onwards the surface is also spectacular. Be careful in case of recent rains, the central km become practically unfeasible.