PR-PNPE-29. Pass Los Picayos, Picos de Europa This hiking route “Los Picayos” is within the Picos de Europa National Park, starting in “San Esteban” (Asturias), to end in “Tresviso ” (Cantabria). It has a slope of more than 700 meters with areas of considerable hardness and lasts approximately four hours at an easy pace and with small stops to get supplies. It is a demanding, beautiful route with history, as it was used by shepherds