The Krimmler Ache is a river in the Pinzgau region of the Austrian state of Salzburg, a right tributary of the Salzach at Vorderkrimml, Wald im Pinzgau. The Krimmler Ache is fed by the Krimml glacier, making the river a glacial stream. The Krimmler Ache is the source of the Krimml Waterfalls, one of Austria's largest tourist destinations.