UNESCO Global Geoparks, created by UNESCO’s latest programme, are territories where science, education, tourism and communication support a territorial development strategy that aims to be holistic and sustainable. In this context, the Estrela Geopark is one of the biggest development strategies for the Estrela Mountain in the twenty-first century, integrating nine municipalities and involving different networks of local agents who can benefit from the UNESCO Global Geopark classification. As such, a strategic plan for this Territory was developed, based on the main areas of action of a UNESCO Global Geopark, constituting a development strategy based on its exceptional Geological Heritage, involving the populations and their resources, in a structured and integrated approach, through a Bottom-up approach. The Strategic Plan for the Estrela Geopark assumes itself as a guiding document, where the priorities for the sustainable development of Estrela are defined, anchored in the various objectives of this classification and in the UNESCO brand, assuming that in these elements, geological heritage, territorial-based development strategy and UNESCO brand, the conditions are met for what will be the major paradigm shift for the highest mountain in mainland Portugal.