the river rises above sea-level on the southern face of rohtang pass in kullu. it traverses the mandi district and enters the kangra district at sandhol, above sea-level. during its lower course the beas is crossed by numerous ferries, many of which consist of inflated skins (darais). near reh in kangra district it divides into three channels, which reunite after passing mirthal, above sea-level. on meeting the sivalik hills in hoshiarpur, the river sweeps sharply northward, forming the boundary with kangra district. then bending round the base of the sivalik hills, it takes the southerly direction, separating the districts of gurdaspur and hoshiapur. after touching the jalandhar district for a short distance, the river forms the boundary between amritsar and kapurthala. finally the beas joins the river sutlej at the south-western boundary of kapurthala district of punjab after a total course of . the chief tributaries are bain, banganga, luni and uhal.