It originates in the Sierra de las Nieves, in the municipality of Igualeja, and ends at the Guadiaro river; it is thus in the Mediterranean basins of Andalusia and belongs to its hydrological demarcation.

Downstream, the Fuenfría arroyo joins it and it receives contributions from the Oreganal mountain range, including the Malillo spring.

The vegetation of the area presents characteristics typical of the lower Mesomediterranean and Thermomediterranean geological series of Ronda, Malacitano-Almijarense, Alpujarreña, Almería-Western and Manchego-Espunense Mesotrogerian, Juarez-Almería-Edafo-Hygrophilic Geoseries.

There are also some invertebrates such as crayfish, odonates and the black cork oak spider, which is an endemism from the south of the Iberian peninsula.

Also there are species of fish like the marine lamprey, tusk, the gypsy barbel, the Málaga chub, the eel; different amphibians such as the southern pintopod sapillo or the salamander subspecies that extends south of the Guadalquivir; and birds such as the blackbird, kingfisher and various species of birds of prey.1 Puente Nuevo (Ronda) Puente Viejo (Ronda)