Puerto de San Lorenzo
Puerto de San Lorenzo is a high mountain pass at an elevation of 1.348m (4,422ft) above the sea level, located in the province and autonomous community of Asturias, in northern Spain. Long and steep (with some parts up to 18%) best describes the climb but it is worth it as the scenery is spectacular.
The road to the summit is asphalted. It’s called AS-265. Open to traffic throughout the year, may be closed for short periods in winter when the weather is bad. At the summit is a parking lot and a viewpoint. The pass links the villages of San Martín and La Riera. It is not especially long, but is steep, with many sections where the gradient is above 10%.
The climb has been featured in the Spanish Vuelta race. Starting from La Riera de Somiedo, the ascent is 10.4 km long. Over this distance, the elevation gain is 871 meters. The average percentage is 8.4 %. And starting from San Martín, the ascent is 10.6 km long. Over this distance, the elevation gain is 867 meters. The average percentage is 8.2 %.