| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Quilacoya River | Biobío River | ||||||||||
| Tavolevo River | Biobío River | -37.4694666667 | -72.6867833333 | Map | |||||||
| Río Huaqui | Biobío River | -37.3713888889 | -72.6675000000 | Map | |||||||
| Estero Bureo |  | Biobío River | 90,000 | -37.5803900000 | -72.5029700000 | Map | |||||
| Laja River (Chile) |  | 4,040,000 | Laja Lake | Biobío River | 140,000 | -37.2699030000 | -72.7243420000 | Map |