Climbs between the Río Porma and Río Curueño

The ride

Roll out of Puebla de Lillo and follow the Río Porma before the route climbs into the Parque Regional de la Montaña de Riaño y Mampodre nature reserve. Next comes the Reserva de la biosfera de Los Argüellos, another nature reserve, and then the Río Curueño. With 57.0 km and 1844 m of climbing, most of it on unpaved surface, the loop brings you back to where you started.