| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Acheron River (Marlborough) |  | Clarence River | 60,000 | -42.1252000000 | 173.1030000000 | Map | |||||
| Bluff River (New Zealand) | Clarence River | 10,000 | -42.1666666700 | 173.5333333300 | Map | ||||||
| Gloster River | Clarence River | -42.2666666667 | 173.3000000000 | Map | |||||||
| Styx River (North Canterbury) | Clarence River | 7,000 | -42.4454000000 | 172.7990000000 | Map |