Valley of the Riera de Merlès Nature · Santa Maria de Merlès, Berguedà, Barcelona Image of Santa Maria de Merlès, not of the place itself. A wooded valley in the south of the Berguedà, crossed by the riera de Merlès, a 47-kilometre watercourse that rises at 1,150 metres altitude and runs from north to south through the municipalities of Sant Jaume de Frontanyà, Les Llosses, Borredà, La Quar, Lluçà, Sagàs, Santa Maria de Merlès and Puig-reig, before flowing into the Llobregat at 328 metres altitude. Its basin covers 173 km². In the lower stretch, Aleppo pine, oaks and holm oaks predominate; in the middle and upper zones, Scots pine, hazels and beech woodland, while ash, elm, grey willow and willow grow on the riverbank. Since 1987 it has been declared a partial nature reserve and included in the Plan of Areas of Natural Interest. Photo: Viquipèdia (CC BY-SA 3.0) What to see and do in Santa Maria de Merlès