It also has an average gradient of 17% and max of around 24%. This is Muro di Sormano.
The road cycling season traditionally closes with the Giro di Lombardia but this is the first time in 50 years this climb has featured in the race.
Great video put to some fitting music. Watch out for the wheelies.
Road.cc have all the details on why and how it came back to the race after the road had fallen into disrepair.