The soils of the Cordillera de la Costa are highly anthropized and have suffered degra-dation processes of different intensity. The first studies to quantify these processes date back to 1970 by CIREN through local soil sampling based on geomorphological criteria. A refinement of this classification is proposed for the Andali & eacute;n basin (36 degrees 42'S), which has historically been dedicated to agriculture, then converted to forest use and environ-mentally degraded. From the physicochemical characterization of soils, 8 types of soils were recognized using the USDA methodology (1999) and their erodibility was evaluated from the K equation of the RUSLE model. The results show that 63,8% of the soils show moderate erodibility (0.25-0.40 T ha h ha-1 MJ-1mm-1). In conclusion, the degradation processes occur within the framework of an economic model of lack of protection of natural resources, so these antecedents contribute to the discussion of proposals for soil management and recovery on a regional scale. It also stresses the need for continuous updating of this type of information for local, regional and national decision-makers.