Demanding mountainbike tour starting in Hahnenklee, crossing Oberharzer mountain valleys and the mountain peaks of Schalke and Bocksberg The tour begins with varied descents in Grane-, Innerste and Schildautal valley near Seesen. From here it goes with steep ascents and descents, beautiful views and a few ponds over the mountain town of Wildemann to Clausthal-Zellerfeld. After about two thirds of the route, the Schalke is the highest point of the tour. The Schalke lookout tower is the oldest of four steel lookout towers in the Harz mountains and offers wide views of the surrounding Oberharz. The route continues down from the Schalke to the water reservoir Okertalsperre and then crosses the Rammelsberg mountain with a long descent down to the city Goslar. From here the longest ascent of the tour to the Bocksberg starts with around 450 vertical meters and steep inclines. The last descent leads directly from Bocksberg to Hahnenklee.