Ardibide
Ardibide is a high mountain pass at an elevation of 1.457m (4,780ft) above the sea level, located in the autonomous community of Navarre, northern Spain. The climb is simply brutal, with sections up to 30%.
The road to the summit is concrete, but extreme due the brutal steep grade, with sections up to 30%. Starting from Isaba, the ascent is 4.8 km long and the elevation gain is 684 meters. The average percentage is 14.25% but the maximum slope is 30%.
Pic: http://www.casaursula.com/Actividades/Ardibide-Pikua/