{{short description|River in Germany}} {{Infobox river | name = Regen | image = Regen (Fluss) Lappersdorf.jpg | image_caption = The Regen near Lappersdorf | source1_location = Bohemian Forest | mouth_location = Danube | mouth_coordinates = {{coord|49|1|35|N|12|6|13|E|display=inline,title}} | progression = {{RDanube}} | subdivision_type1 = Country | subdivision_name1 = Germany | length_km = 190.9 | length_ref = {{GeoQuelle|DE-BY|GV}} | source1_elevation = | discharge1_avg = {{convert|40|m3/s|cuft/s|abbr=on}} | basin_size_km2 = 2878 | basin_size_ref = {{GeoQuelle|DE-BY|GV}} }} The '''Regen''' ({{IPA|de|ˈʁeːɡn̩|-|De-Regen2.ogg}}; {{langx|cs|Řezná}}) is a river in Bavaria, Germany, and for a short distance in the Czech Republic. It is a left tributary of the Danube, at Regensburg, Germany.
==Etymology== The name in German evolved from the name in Latin, but its meaning is unknown. The Romans called the river variously {{Lang|la|Regana}} (feminine gender), {{Lang|la|Reganus}} (masculine), and {{Lang|la|Reganum}} (neuter).
==Geography== The source of its main headstream, the {{Lang|de|Großer Regen}} ('Great Regen'), is located in the Bohemian Forest on the southern slopes of Mt. Pancíř at {{cvt|1060|m|ft|abbr=on}} above sea level, in the territory of Železná Ruda in the Czech Republic. The river crosses the Czech-German border after a few kilometres, at Bayerisch Eisenstein.
At Zwiesel, the Great Regen is joined by the {{Lang|de|Kleiner Regen}} ('Little Regen') to form the {{Lang|de|Schwarzer Regen}} ('Black Regen'). The Schwarzer Regen flows through Regen and Viechtach, and is joined by the {{Lang|de|Weißer Regen}} ('White Regen') in Bad Kötzting. Beyond this confluence, the river is called Regen. The river's total length, including its headstreams, the Great Regen and Black Regen, is {{convert|191|km|mi}}. The Kleiner Regen crosses the Frauenau Reservoir.
The Regen Valley forms the main valley crossing the Bavarian Forest; many settlements within the mountains are located along the river. Cities along the Regen river include Cham and Regensburg.
==See also== * Regen (city in Germany) * List of rivers of Bavaria * List of rivers of the Czech Republic
== Sources == * Franz Bogner: ''Der Regen. Ein Luftbildporträt vom Arber bis Regensburg''. Pustet, Regensburg 2007, {{ISBN|978-3-7917-2054-8}} (Bildband). <!-- fraglich, ob vertiefende Literatur, s. WP:WEB --> * Bärbel Kleindorfer-Marx (Hrsg.): ''Der Regen. Kultur und Natur am Fluss''. Buch & Kunstverlag Oberpfalz, Amberg 1996, {{ISBN|3-924350-56-6}}.
==References== {{Reflist}}
== External links == * {{Commons category-inline|Regen (river)}}
{{Danube}} {{Rivers of Germany}} {{Authority control}}
Category:Regen basin Category:Rivers of Bavaria Category:Bavarian Forest Category:Federal waterways in Germany Category:Bohemian Forest Category:Rivers of Germany Category:Rivers of the Plzeň Region