The Trefacio River and its trout Nature · Trefacio, Sanabria, Zamora Image of Trefacio, not of the place itself. The river that gives the village its name is one of the most sought-after trout courses in the comarca; it runs seven kilometres from the lake of Sanabria, within the natural park, among valleys of oak grove and pasture. Photo: M.Peinado from Alcalá de Henares, España (CC BY 2.0) What to see and do in Trefacio