This work assesses the environmental susceptibility in face of "Ecoturism" demand in the Curutu nucleus of the State Park of Serra do Mar, situated in the south of São Paulo City and north of the Escarpa and coast of the ltanhaém and Mongaguá. The theoretical and methodological foundations of the research are based on geomorphologic analysis of morphodynamic instability and stability of land, by identifying the capability and the degree of environmental fragility. It aims to reorganize land use from an "Environmental Zoning of Land Use Capability", on 1:50,000 scale setting up five categories of zones:
Furthermore, the research is assessing the six tracks of public visit from fields data and 1:10,000 scale thematic maps. The aim is deepening the analysis of environmental capability of the tracks and their surroundings, checking the proposed enviromental zoning. The tracks are concentrated in areas of the Planalto Paulistano and Escarpa, with convex or angular top high mounts, where the soils are sandy over gneissic granites facilitate an intensive land dissecting. The slopes are over 20o a thresholds for landslides on the Serra do Mar. From the results, some guidelines for public use of the nucleus reorganization are being set, and one of them is the definition of rules for tracks visiting, aiming not to overcome the environmental capability identified or giving up another ones because of their high degree of fragility and morphodynamic instability. Moreover, the proposal of new tracks in sites more appropriated to the sustainable use of resources is being considered.