[1] The Waag rises in the mountains of Gross Stärnen and Chli Stärnen at the Schwyz Alps, in the municipality of Oberiberg, and flows north-northeast into the village of Unteriberg.

At Laueli, the Waag reaches the valley floor, where the artificial Sihlsee reservoir flows into it.

The Waag passes Lehweid, Hintertwingi, Twingi and Vordertwingi, where the Sitibach flows towards it from the east, before it resumes its northeasterly course.

It then passes the villages of Waag and Herti, before finally flowing into the Minster river.

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