| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Arroyo Las Piedras | Olimar Grande River | 18,000 | -33.2736111100 | -54.3208333300 | Map | ||||||
| Arroyo yerbal grande | 1,800,000,000 | Olimar Grande River | 80,000 | -33.2380555600 | -54.4069444400 | Map | |||||
| Olimar Chico River | 1,800,000,000 | Olimar Grande River | 115,000 | -33.2330555556 | -54.5152777778 | Map |