Puerto de Piedrasluengas is a high mountain pass at an elevation of 1.355m (4,445ft) above the sea level, located in Castile and León region, in northern Spain.
Located in the Cordillera Cantábrica mountain range, the road to the summit is totally paved. It’s called C-627 and links the towns of Cervera de Pisuerga and Potes. Open to traffic throughout the year, may be closed for short periods in winter when the weather is bad. It suffers the harsh meteorological conditions of the area every winter.
The pass has been featured in the Spanish Vuelta. Starting from Puentenansa, the ascent is 37.6 km long. Over this distance, the elevation gain is 1.193 meters. The average percentage is 3.17 %, with some steep sections, up to 10.0%.