Drena (German obsolete Drenn) is a municipality with a population of 570 (December 31, 2015) about ten kilometers north of Lake Garda and 25 kilometers southwest of Trent in the valley of Salagoneflusses, a tributary of the river Sarca. The surrounding mountains reach over 2000 meters. At the beginning of the side valley 250 meters above the Sarca Valley lies the ruins of Drena, which was until 1981 in the possession of the Counts of Arco and since then is in the city possession. The village belonged to the end of World War I to the judicial district of Arco and was part of the district of Riva. Below the castle, the Canyon di Drena, a narrow rocky valley in which is used to be the escape route from the castle and now a fixed rope runs. Partner Municipality of Drena is the Upper Franconian municipality Hallerndorf since 1989th Reason for the partnership were numerous visits by individual families from Hallerndorf in Drena.