|- location||Ötztal Alps|
|Length||66.5 km (41.3 mi) |
|Basin size||893 km2 (345 sq mi) |
|Progression||Inn→ Danube→ Black Sea|
The Ötztaler Ache is a right tributary of the Inn in the district of Imst, Tyrol, Austria. It flows through the Ötztal, a southern side valley of the Inntal. Including its source rivers Venter Ache and Rofenache, it is 66.5 kilometres (41.3 mi) long. The Rofenache is the runoff of the Hintereisferner, a glacier at the foot of the Weißkugel, Ötztal Alps. At Vent it takes up the Niedertalbach and changes its name to Venter Ache. At the confluence with the Gurgler Ache in Zwieselstein the Ötztaler Ache proper is formed. It flows through Sölden, Längenfeld, Umhausen and Oetz before joining the river Inn 8 kilometres (5.0 mi) east of Imst. The river is one of the bigger tributaries.