The mountain has a length of approximately 6 km and an average width of 1 to 2 km. All of its slopes except for those on the southern side are covered with coniferous or mixed forest. On the upper slopes, and especially on the eastern slope of the Röckinger mountain, there are large areas of deciduous forest. The upper part of the prominent southern side is free of forest. On the southern and north-eastern slopes there are large areas of neglected grassland with their typical juniper bushes. Hesselberg can be divided into 5 sections along its center-line (see panorama image).