The Surselva encompasses the valley of the Vorderrhein/Rein Anteriur (the Surselva) and all its side valleys, from the source near the
Oberalp Pass all the way down towards Reichenau (where the Vorderrhein joins the
Hinterrhein/Rein Posteriur to form the
Alpine Rhine). The region ends before that confluence at the huge forest on the giant debris of
Flims Rockslide that is responsible for the name of the region: The debris area lack of water and soil and were ever left as a big forest as it was useless for farming. This forest (Romansh:
silva) is the border for
Sur-silva (meaning 'above the forest'). The Surselva is one of the few areas in Switzerland that is mainly
Romansh-speaking (another notable valley being the
Engadine, the valley of the Inn). The most important community in the Surselva is
Disentis/Mustér, with its
Benedictine monastery, which dates back to 720. There are a few
German-speaking communities in the Surselva, e.g.
Obersaxen and
Vals, which were founded in the thirteenth century by the
Walser. A long-distance hike is signposted to follow the full length of the main valley of the Anterior Rhine. ==Municipalities==