View from ''La Picota''. The Lakes of Covadonga (Lago de Enol and Lago de la Ercina - el. 1134 m.) are two glacial lakes located on the region of Asturias, Spain. These lakes, often also called Lakes of Enol or simply Los Lagos, are Lake Enol and Lake Ercina located in the Picos de Europa range and they are the original center of the Picos de Europa National Park, created in 1918. The road ascending from Covadonga to the lakes is a popular climb in professional road bicycle racing. The road that leads to the lakes starts at Covadonga and is 12.6 kilometres long at an average gradient of 7.3% (height gain: 1056 m). The most demanding section is La Huesera, 7 kilometres from the top of the climb, with an average gradient of 15% during 800 meters. (Wikipedia).