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.

XTERRA O-SEE Ultra Trail 50K

Not only will the more than 2,000 meters of altitude take your breath away on the (originally) hardest and longest kilometers of the Zittau Mountains, the spectacular views will also leave you breathless from time to time. This race can also be completed as a DUO. Necessity is the mother of invention, as they say. So why not tackle this endurance challenge as a team of two (Men, Women, or Mixed)? DUO teams start together, pass through each checkpoint together, and cross the finish line together. Individual scoring is not possible.

XTERRA O-SEE Ultra Trail 25K

Happiness can be so simple. Over 1,000 meters in altitude over 25 kilometers, concentrated with the most beautiful trails that make the endorphins dance. There are few routes in this world that will give you as much pleasure as this one through the beautiful Zittau Mountains. Are you ready?

100K Ultra Trail Run

XTERRA O-SEE 100K Ultra Trail Run is for the long-distance endurance purists, and requires good mountain and trail race experience, plus both the physical and technical skills required to overcome the challenge of an ultra distance trail run.

O-SEE 75K Ultra Trail Run

May it be a little bit more? The O-SEE Ultra Trail with 75 kilometers has been available in the extra-long version since 2021. This race can also be completed as a DUO. Necessity is the mother of invention, as they say. So why not tackle this endurance challenge as a team of two (Men, Women, or Mixed)? DUO teams start together, pass through each checkpoint together, and cross the finish line together. Individual scoring is not possible.

O-SEE 16K Trail Run

Always wanted to try a trail? Then this route is just right for you. Perfect for beginners and lovers of slightly shorter routes. 16 kilometers full of fun and pure joy of running, peppered with highlights of the Zittau Mountains.