The Ravi River originates in the Himalayas in the Multhan tehsil of Kangra district of Himachal Pradesh, India. It follows a north-westerly course and is a perennial river. It is the smallest of the five Punjab rivers that rises from glacier fields at an elevation of , on the southern side of the Mid Himalayas. It flows through Barabhangal, Bara Bansu and Chamba districts. It flows in rapids in its initial reaches with boulders seen scattered in the bed of the river. The Ravi River in this reach flows in a gorge with a river bed slope of and is mostly fed by snow melt, as this region lies in a rain shadow. Two of its major tributaries, the Budhil and Nai or Dhona join downstream from its source. The Budhil River rises in Lahul range of hills and is sourced from the Manimahesh Kailash Peak and the Manimahesh Lake, at an elevation of , and both are Hindu pilgrimage sites. The entire length of Budhil is where it has a bed slope of . It flows through the ancient capital of Bharmwar, now known as Bharmour in Himachal Pradesh. During 1858-1860, the Raja of Bharmour had considered the Budhil valley as an excellent source of Deodar trees for supply to the British Raj. However, a part of the forest surrounding the temple was considered sacred and declared a reserved area. The second tributary, the Nai, rises at Kali Debi pass, and flows for , with a bed slope of , from its source at Trilokinath to its confluence with the Ravi. This valley was also exploited for its forest wealth during the English period.