The main range of mountains in Central Java is the North and South Serayu Mountains. The North forms a mountain chain that connects the Bogor range in West Java with the Kendeng Mountains in the east. The width of this mountain range is around 30–50 km; on the western end there is Mount Slamet, which is the highest mountain in Central Java as well as the second-highest mountain in Java, and the eastern part is the Dieng Plateau with peaks of Mount Prahu and Mount Ungaran. Between the series of North and South Serayu Mountains are separated by the Serayu Depression which stretches from Majenang in the Cilacap Regency, Purwokerto, to Wonosobo. East of this depression is the Sindoro and Sumbing volcano, and the east again (Magelang and Temanggung areas) is a continuation of depression which limits Mount Merapi and Mount Merbabu.