The Rakshan River (Urdu: دریائے رخشن) rises at the Nidoki pass, south-west of Shireza, district Washuk, Balochistan, Pakistan.
To the west of Kallag, the last village in Panjgur is Dabbag, where there are more pools and many long grass, tamarisk and kahur trees in which wild pigs were to be found in the early 20th century.
After traversing Panjgur, the main stream turns northward and joins the Mashkel River from Kuhak on the Iranian side just south of the point where it bursts through the Koh-e-Sabz range by the Tank-e-Grawag or Grawag defile.
The Mashkel River crosses the Siahan Range at Tank-e-Zurrati and runs along the western side of Kharan to the Hamun-i-Mashkel, the total length from the source of the Rakshan being 258 miles.
Through a considerable water course, the banks of the Rakshan are low, shelving and irregular, consisting of hard clay known as kork in the Balochi language.