Iller
River in Germany

The Iller (German: [ˈɪlɐ] ⓘ; ancient name Ilargus) is a river of Bavaria and Baden-Württemberg in Germany. It is a right tributary of the Danube, 146 kilometres (91 mi) long.
It is formed at the confluence of the rivers Breitach, Stillach and Trettach near Oberstdorf in the Allgäu region of the Alps, close to the Austrian border. From there it runs northwards, passing the towns of Sonthofen, Immenstadt, and Kempten.
Between Lautrach near Memmingen and Ulm it forms the border between the two German States Bavaria and Baden-Württemberg for about 50 kilometres (31 mi). The river flows into the Danube in the city centre of Ulm.
The Iller has a catchment area of 2,152 square kilometres (831 mi2). It ranks as the seventh of Bavaria's rivers by water flow, with an average throughput of 75 cubic metres per second (2,600 cu ft/s) at Senden, a short distance upstream from the Danube. The river is used for the production of hydroelectricity via eight power stations with a total net capacity of 51 MW (1998).
A bicycle route follows the Iller, which is also a popular location for rafting and trekking.

Sources and credits
This article is adapted from the Wikipedia article “Iller”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.
Images, from Wikimedia Commons:
- Illertal-2008-12-29b.jpg by cinecol, CC BY-SA 3.0
- Bij Steinheim, de Iller foto2 2014-07-28 13.39.jpg by Michielverbeek, CC BY-SA 4.0
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