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| Trettach | |
|---|---|
| | |
| |
| Location | |
| Country | Germany |
| State | Bavaria |
| Physical characteristics | |
| Mouth | |
• location | Iller |
• coordinates | 47°25′38″N10°16′26″E / 47.4273°N 10.2740°E |
| Length | 15.6 km (9.7 mi) [1] |
| Basin size | 157 km2 (61 sq mi) [1] |
| Basin features | |
| Progression | Iller→ Danube→ Black Sea |
Trettach is a river of Bavaria, Germany. At its confluence with the Breitach and the Stillach in Oberstdorf, the Iller is formed.