| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Río Lamasón | Río Nansa | 17,246 | 43.2930000000 | -4.4585200000 | Map | ||||||
| Latarmá River |  | Río Nansa | 43.2792400000 | -4.4825400000 | Map | ||||||
| Río Pejanda | Río Nansa | 4,005 | |||||||||
| Río Vendul | Río Nansa | 11,503 | 43.2335000000 | -4.3975500000 | Map |