View of Lake Iseo from Colli di San Fermo

The Colli di San Fermo can be reached via 3 different itineraries, the best known are from Grone in ValCavallina and Adrara. The first is a very tough climb with 20% sections. The third side is from Vigolo, via green road and sometimes mule tracks. I recommend this third itinerary as the most spectacular given the view of Lake Iseo and the non-existent traffic.

Ascent that from Grone in the initial part reaches abundantly the double figure of average gradient with peaks close to 20%, then becomes a little easier after halfway
To do with good training and agile relationships

Nice climb, long and regular from Villongo / Adrara, while it lasts with hairpin bends and straight 20% from Grone. The longest climb from Tavernola / Vigolo is spectacular, with long stretches of concrete and short dirt roads