Explore hiking trails around Cier-de-Rivière, Midi-Pyrénées. The best hike near Cier-de-Rivière is Cascada Cola de Caballo Loop via Senda de Los Cazadores and Senda a la Cola de Caballo, a 11.7 mile loop in Parque Nacional Ordesa y Monte Perdido. Cier-de-Rivière has population 277.0.