espanolLa finalizacion del conflicto armado entre las Fuerzas Armadas Revolucionarias de Colombia y el gobierno colombiano -en 2016-, ha permitido que el turismo se posicione como una de las actividades economicas que mas aporta a la economia del pais, especialmente en zonas que estuvieron aisladas por el conflicto. En este escenario de consolidacion de la paz se plantean, por parte del gobierno nacional, politicas enfocadas a la promocion del turismo, siendo una de las modalidades mas notorias el Ecoturismo, especialmente en areas protegidas como los Parques Nacionales Naturales de Colombia. Debido a las expectativas que generan las actividades turisticas en estas areas, se hace necesario evaluar el rol de este fenomeno en el desarrollo local y los impactos asociados al interior y exterior de dichas areas, por tal razon se seleccionaron cuatro areas protegidas en las que se aplico una metodologia basada en el analisis de redes, para evaluar los impactos a traves de las relaciones de causalidad que se dan entre las actividades humanas y los cambios en el ambiente, encontrando que al interior de los parques los impactos mas significativos se relacionan con la compactacion del suelo, la perdida de cobertura vegetal, la desaparicion de fauna y la alteracion de la calidad del agua superficial. Mientras que al exterior se generan cambios importantes en las actividades economicas, aceleracion de la expansion urbana, estimulacion de la economia local, cambio en la oferta de bienes y servicios locales, y se desincentivan otras actividades como la produccion agricola. EnglishTourism in Postconflict Colombia: Environmental Impacts and Contributions to Local Development. The end of the armed conflict between the Revolutionary Armed Forces of Colombia and the Colombian government in 2016 has meant an impulse of tourism, making it to become one of the economic activities that contributes most to the country's economy, especially in areas that were isolated by the conflict. In this scenario of peacebuilding, the national government has proposed the realization of policies focused on the promotion of tourism, with Ecotourism being one of the most notorious modalities, especially in protected areas such as the National Natural Parks of Colombia. Due to the high expectations generated by the promotion of tourist activities in these areas, it becomes necessary to evaluate its role in local development and its impacts on the interior and exterior of these natural areas. To this aim, four protected areas were selected for the application of of an evaluation methodology based on network analysis. This methodology allowed to evaluate the impacts through the causal relationships that occur between human activities and changes in the environment, finding out that the most significant impacts inside the parks are those related to soil compaction, loss of vegetal cover, the chasing away of fauna and the alteration of the quality of the superficial water. However, outside the parks there are generated important changes in the economic activities, the acceleration of urban expansion, the stimulation of the local economy, the change in the supply of local goods and services, and the withdrawal of other activities such as agricultural production