The Itelteich is a former nature reserve in the Lower Saxony municipality of Walkenried in the Göttingen district. The former nature reserve with the license plate NSG BR 002 is 120 hectares in size. It was part of the FFH area "gypsum karst area near Bad Sachsa". In the east it borders on the former nature reserve "Juliushütte", in the west on the former nature reserve "Gipskarstlandschaft Bad Sachsa und Walkenried". To the north-west and south-east it borders on the "Harz" nature reserve. The area was under nature protection on March 16, 1950. In February 2021 it opened up in the newly designated "Gipskarstgebiet bei Bad Sachsa" nature reserve. The responsible lower nature conservation authority was the district of Göttingen