| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Groot River (Eastern Cape) |  | Gamtoos River | -33.7458333333 | 24.6152777778 | Map | ||||||
| Kouga River |  | Gamtoos River | -33.7458000000 | 24.6153000000 | Map |