Ach (Ammer)

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Ach
River Ach south of Uffing
Mouth
Location
Country	Germany
State	Bavaria
Physical characteristics
Mouth
• location	Ammer
• coordinates	47°47′03″N 11°06′28″E / 47.7841°N 11.1077°E / 47.7841; 11.1077
Length	43.0 km (26.7 mi) [1]
Basin size	120 km2 (46 sq mi) [1]
Basin features
Progression	Amper→ Isar→ Danube→ Black Sea

The Ach is a tributary of the Ammer river in Bavaria, Germany. Its total length, including its source rivers the Glotzenbach and Bärenbach, is 43 kilometres (27 mi). It is the main river flowing through the Staffelsee, and flows into the Ammer east of Peißenberg.