Muro de Arraiz
The Muro de Arraiz is a brutal climb located in Bilbao, Basque Country, in northern Spain, with some parts up to 20%.
The road is asphalted but pretty narrow and steep with some hairpin turns. The ascent is 2,4 km long. The average gradient is 11.5%, with sections up to 20%. It has been climbed in the Spanish Vuelta. Closed to hevy vehicles (5Tn).