The Vadiniense Route through Boca de Huérgano Activity · Boca de Huérgano, La Montaña de Riaño, León A pilgrim variant linking the Picos de Europa with the Camino Francés which crosses several of the municipality's villages following the Yuso-Esla valley, on one of the loneliest crossings in the north of the peninsula. Photo: Simon Burchell (CC BY-SA 4.0) What to see and do in Boca de Huérgano