The Alto de l'Angliru, known mostly as 'the Angliru', conjures both fear and defiance for cyclists. A legendary mountain pass in Spain's Asturias region, it is generally accepted to be the most difficult climb in Spain.
The full length from bottom to top is 12.4km with an average gradient of 9.7%. It's the second half of the narrow, twisting road that gives the climb notoriety as it winds beside steep walls with rocky outcroppings and provides sweeping views of the Asturias region of northern Spain without obstructions of trees. Signs on the road also alert casual riders to how steep each section is.
