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You can leave your car or bike on one of the parking places near the lake. There is a little foot path, which takes you in the forest. After about 100 m, on the lake side, by the roots of a tree there is the cache.
The cache is a tupperware box which contains :
Logbook (please do not remove)
Pencile(please do not remove)
Cachnote (please do not remove)
In a week or so I will try to put a photo from the place on this site.
(No hints available.)