Nebelhorn - Germany’s hardest climb! Germany, On Tour

Start town - Oberstdorf

Length of climb - 9.9km

Average gradient - 14.2%

Maximum gradient - 35%

Colle Fauniera Italian Alps, On Tour

Start town - Pradleves

Length of climb - 21.9km

Average gradient - 7.6%

Maximum gradient - 15%

Col de la Loze French Alps , On Tour

Start town - Méribel

Length of climb - 7km

Average gradient - 10%

Maximum gradient - 20%

Alto de l’Angliru On Tour, Spain

Start town - Mirador del Angliru

Length of climb - 8.5km

Average gradient - 11%

Maximum gradient - 24%