This trail is not for the faint-hearted. O-SEE Ultra Trail is the ultimate challenge, a tiny adventure and an awesome experience for all nature seekers. A must visit event located in the smallest of German low mountain ranges.

​Zittau Mountains Nature Park is embedded in the tripoint with Poland and the Czech Republic, and offers a variety of challenging trails with a stunning scenery in the backdrop. Breathtaking views and unforgettable moments are guaranteed as you ascend the sloping sandstone walls.

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Start and finish are in the scenic village of Oybin, situated at the foot of the mountain of the same name. The ruins of a medieval monastery and many bizarrely shaped sandstone formations lend a wild romantic beauty to it. As one of the best known climbing spots in all of Zittau Mountains, and probably the most climbed as well, the Kelchstein graces the medals for the event.