Trekking in Restricted RegionTrekking in Upper Mustang consists of two distinct regions: the southern region, with five villages inhabited by people related to the Manangis; and the northern region (the ancient kingdom of Lo), where the language, culture and traditions are almost purely Tibetan. The capital of Lo is named Manthang, which translates from the Tibetan as 'plain of aspiration'. The portion of the upper Mustang district north of Samar is Lo and its capital is Manthang. The king of Lo is the Lo Gyelbu.