| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Mendoza River |  | 11,320,000,512 | 6,000 | Aconcagua | San Juan River | 273,000 | -32.1280555556 | -68.2055555556 | Map | ||
| Río de los Patos |  | San Juan River | 190,000 | ||||||||
| Castaño Viejo River | San Juan River | -30.9833333333 | -69.5666666667 | Map |