The Ötztaler Ache is a river in the district of Imst, Tyrol state of Austria. It is a right tributary of the Inn. It flows through the Ötztal valley, a southern branch the Inntal. Including its source rivers Venter Ache [ceb; de; nl; sv] and Rofenache [ceb; de; sv], it is 66.5 kilometres (41.3 mi) long. The Rofenache is the runoff of the Hintereisferner [ceb; de; nl; sv], a glacier at the foot of the Weißkugel, Ötztal Alps. At Vent [cs; de], near Sölden, it takes up the Niedertalbach [ceb; de; sv] and its name changes to Venter Ache. At the confluence with the Gurgler Ache [ceb; de; nl; sv] in Zwieselstein [ceb; de; sv], Sölden, the Ötztaler Ache proper is formed. It flows through Sölden, Längenfeld, Umhausen and Oetz before joining the Inn 8 kilometres (5.0 mi) east of Imst. The river is one of its bigger tributaries.

• Ötztaler Ache in Habichen
• Bodele, Ötztaler Ache from the Riederbrücke
• between Umhausen and Längenfeld, the Ötztaler Ache
• between Längenfeld and Umhausen, the Ötztaler Ache from the Ferdinands Radbrücke
• Aschbach, the Ötztaler Ache near the Waldwegbrücke