Trettach River

General data
- Water type: River
- Progression: Iller -> Danube -> Black sea -> Mediterranean Sea -> Atlantic Ocean -> Planet Earth
- Climates: Continental
- Continents: Europe
- Countries: Germany
Description
Trettach is a 16 km long river of Bavaria, Germany. At its confluence with the Breitach and the Stillach in Oberstdorf, the Iller is formed.