The climb that leads to the Prato Maslino mountain pasture, starting from Berbenno di Valtellina, is considered one of the toughest in the area. It is about 11 kilometers long to overcome 1300 meters of altitude difference with an average gradient of over 10%. Some ramps are very severe and exceed 20%. The road is narrow and the surface can be ruined in some places. To be faced with a strong heart and trained legs.