Starting in Lohberg take trail „Goldsteig“ (golden S) till you see the direction sign. Now turn into hiking trail LO5. Passed Lohberg continue via Perlesbach and further to the right towards the hamlet Oberhaidberg.
In Oberhaidberg turn right at the first house, into the forest, continue untill you reach a junction where you turn left. You will cross the street "Straße zum Großen Arber". Follow LO5 and keep right. A steep path leads upwards to Zwercheck, the hike's first stage.
From the top you have a great view on the „king of the bavarian forest“ mountain Arber and others. Follow the path alongside the czech border slightly to the right and discover the remainings of hut Juranek, which was the first guesthouse hosting skiers in this area.
Follow the white and blue boundary posts for guidance. You will have a constant view on both countries and on the czech side you can see lake Nyrsko. Before you reach the peaks Ossergipfel turn right at a junction. Steeply ascend a couple more meters and you will have reached Großer Osser at 1293m hight.
Take a rest at guesthouse Osserschutzhaus. A detour to the smaller mountain kleiner Osser is definitely worth the trouble. There you can enjoy a great view across bavarian forest. Kleiner Osser is easy to reach, simply follow the signs.
Start descending below the peak, follow the trails Goldsteig and L01. Now continue downwards on rocky paths and keep following the signs until you reach the parking lot Osserparkplatz. Now walk through Lohberg and you are back where you started the tour.