| Cederberg Mountains|
456 m (1,496 ft)
| 735 m (2,411 ft)|
| Confluence with the Riet River, Western Cape|
The Groot River (English: "Large River") is a river in the Western Cape Province, South Africa. It is part of the Olifants/Doring River system. It should is not to be confused with the Groot River of Eastern Cape and the Groot River of Southern Cape provinces.
Groot River (Western Cape) Wikipedia
It is formed by the confluence of the Twee River and Lang River, flowing off the eastern slopes of the Cederberg Mountains, south-east of Citrusdal.
The river flows in an easterly direction through the Skurweberge Mountains where it joins the Riet River that rises as the Winkelhaak River and Houdenbeks River north of Ceres. Below this confluence, the Riet River is joined by the Brandkraals River and Matjies River, after which it flows into the Doring River.
The Clanwilliam Yellowfish (Labeobarbus capensis), a local endemic classified as Vulnerable by the IUCN, is still found in this river.