| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pisueña (river) |  | 201,000,000 | Pas | 36,200 | 43.3134000000 | -3.9467900000 | Map | ||||
| Río Magdalena (Cantabria) | Pas | 15,809 | 43.1515330000 | -3.8961560000 | Map | ||||||
| Río Viaña (Pas) |  | Pas | 8,716 | ||||||||
| Río Yera | Cantabria | Pas | 8,329 | 43.1583300000 | -3.7863300000 | Map |