|Name origin: Said to be named after a chief|
|- location||SE of Tzaneen|
|- elevation||840 m (2,756 ft)|
|Mouth||Olifants River (Limpopo)|
|- location||Near Phalaborwa|
|- elevation||297 m (974 ft)|
|Length||140 km (87 mi)|
It rises on the rugged western slopes of the Wolkberg Mountains, part of the Drakensberg Mountain chain, about 20 km SE of Tzaneen. From its source in this high rainfall zone, the river flows roughly eastward for approximately 140 kilometres before joining the Olifants River some 7 kilometres to the south of the town of Phalaborwa.
In the dry season, the riverbed of the Ga-Selati is dry for most of its length. This river is heavily polluted owing to mining activity at Phalaborwa in its lower course.