Jammu is one of the three administrative divisions within Jammu and Kashmir, the northernmost state in India. It consists of the districts of Doda, Kathua, Jammu, Udhampur, Rajouri, Ramban, Reasi, Samba, Kishtwar and Poonch. Most of the land is hilly or mountainous, including the Pir Panjal Range which separates it from the Kashmir Valley and part of the Great Himalayas in the eastern districts of Doda and Kishtwar. Its principal river is the Chenab. Chenab Valley is another important division in Jammu region.