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From Rarnerchumma, enter the Bietschtal via the marked "Sudrampe" path, which begins by climbing to Ritzubode.
Around 1150 m.
we can see the bisse (canalized) that crosses the path. A little above, a path leads to the river intake. Exit by the route of the bisse (difficult) but practicable.<br/><br/>_This Adventure has been shared under the [Creative Commons Share Alike](https://creativecommons.org/licenses/by-sa/2.5/) licence._