Tarnak River
The Tarnak River is located in Ghazni, Zabul, and Kandahar provinces of Afghanistan. The city of Kandahar is located on a plain directly adjacent to the Tarnak.
It rises in Afghanistan's highlands region of Hazarajat, near, south of the Lomar Pass. The Tarnak flows in a south-westerly direction for around 350 km before joining the Dori River some 30 km downstream of the Dori-Arghastan confluence, and some 30 km upstream of the Dori-Arghandab confluence, at. The combined waters of these rivers join the Helmand at, near Lashkargah.