Steep route on a road bike… in the middle of the mountains. Towards Balmaseda from Karrantza with two climbs in sight: La Escrito – crowned by the bust of the Virgen del Suceso, who watches over the valley from her vantage point – and La Herbosa. The road to the first city of Bizkaia passes through forests dotted with farmhouses and impossible curves.
Once in Balmaseda, we will cross the medieval old town and take the road to Bercedo (Burgos). Here we will join the N-629, which will take us back to Enkarterri through one of the most beautiful climbs we will have the opportunity to climb: Los Tornos. Its 920 m show us the immense karst panoramas of Lanestosa in all its grandeur. We will end the route in Karrantza, the largest valley in Biscay, after crossing a new pass: Alto de Ubal.