|Along with Mount Sindoro, Sumbing Mountain forms a twin mountain landscape, The gap between this mountain and Mount Sindoro is traversed by a provincial road connecting Temanggung city and Wonosobo city. This street is commonly dubbed as “Kledung Pass”.
Because it is composed of very hard igneous rocks (lava), almost all the slopes of the rugged terrain are very arid, generally only overgrown with bushes, even at a height of approximately 3000 m only overgrown with grasses whose leaves are hairy.
The volcanic crater of the volcano is on the summit called Belirang Crater, the height of 2394 m. In Belirang Crater there are 3 (three) depressions (center of eruption) filled with water, named ‘Telaga Nirwana’, ‘Lake Mabuk’, and ‘Tapak Sulaeman’.
Current volcanic activity is solfatar and fumarole on the eastern crater wall.