Puerto de Pajares is a mountain pass, at an elevation of 1.378m (4,520ft) above sea level, located in the Cantabrian Mountains in northern Spain. The pass is traversed by the N630 road.
This road is usually open all year, but it can be closed anytime when the access is not cleared of snow. It’s known for strong snowfalls in winter, the fog in the summer nights, the slopes that reach up to 17% officially, and the nearby ski resort, Valgrande-Pajares. Heavy snowfalls can sometimes block some sections of the road and can be extremely dangerous due to frequent patches of ice.
There are 3 routes to reach the pass. Starting from Villanueva, the ascent is 7 km long. Over this distance, the elevation gain is 218 meters. The average percentage is 3.1 %. Starting from Puente de los Fierros, the ascent is 13 km long. Over this distance, the elevation gain is 919 meters. The average percentage is 7.1 %. And starting from Campomanes, the ascent is 23.3 km long. Over this distance, the elevation gain is 1.091 meters. The average percentage is 4,7 %. This pass was traditionally the main transport route between Asturias and the Central Plateau, before the construction of the AP-66 road.