Local communities, especially mountain communities in Europe, are increasingly vulnerable to climate risks such as extreme weather events, ecosystem degradation, and resource scarcity. This research introduces a Nature-Based Knowledge Repository: a comprehensive, meta-analysis–based repository that consolidates scientific research, policy frameworks, best practices from EU funded projects (e.g., Horizon Europe, Adaptation Mission, ESPON), and case studies on nature-based solutions (NbS) from across Europe, including applications tailored for mountainous regions. By mapping European NbS policies and synthesizing practical experiences from diverse stakeholders, and by building the repository based on FAIR data management practices, this knowledge hub delivers actionable insights into ecosystem restoration, sustainable land management, and climate risk mitigation and adaptation. It also highlights critical governance enablers and resource allocation strategies for effective implementation within territorial and place-based policies. The repository accumate evidence from academic sources, grey literature, and implemented case studies, and translates complex research into accessible, policy-relevant knowledge. It provides policymakers, local practitioners, and community stakeholders with a dynamic tool to identify opportunities, overcome barriers, and integrate NbS into regional development strategies. By fostering interdisciplinary knowledge exchange and supporting evidence-based decision-making, this initiative helps to enhance the resilience of local communities and support policy development across Europe, supporting inclusive climate adaptation efforts.