| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Río Argonza |  | Saja | 24,000 | 43.0881290000 | -4.1437320000 | Map | |||||
| Río Bayones | Saja | 11,331 | 43.2735300000 | -4.2458400000 | Map | ||||||
| Río Erecia | Cantabria | Saja | 10,812 | 43.1479800000 | -4.0085900000 | Map |