The study concerns a part of the research work developed within the project GreenCamp, funded by the Regione Toscana and aiming at defining a model of sustainable management and competitive territorial campsite cluster. The main objective of the study was a sustainable mobility system for the customers of 3 campsites, located in a protected area, through the evaluation of the economic and environmental sustainability. In order to assess the connection between the 3 campsites and the coastal area as well as the nearby Regional Park of Migliarino, San Rossore and Massaciuccoli, two alternatives for a sustainable mobility have been assessed: a diesel-powered tourist train and an electric tourist train. The comparison between the two alternatives has been carried out by an Environmental Impact Study, through the analysis of the main biotic and abiotic components as well as of the social-economic aspects. The results of the study depicted the strengths and opportunities of both solutions, by also taking into account some weakness and threats. Nevertheless, through some compensation and mitigation measures, both solutions proved to be viable.