The Hennops River is a significant 94-kilometer waterway flowing through Gauteng, South Africa, originating near Kempton Park and ultimately joining the Crocodile River near Hartbeespoort Dam. This river drains a substantial portion of the province and offers urban and peri-urban fishing opportunities, primarily for coarse fish species. It flows in a northerly then north-westerly direction, passing through areas like Tembisa, Olifantsfontein, and the center of Centurion before reaching the foothills of the Magaliesberg. The river's elevation at its confluence with the Crocodile River is approximately 1,212 meters. While it provides accessible fishing in park sections, it is also noted as one of Gauteng's most polluted rivers, which is a significant consideration for anglers.