Mountains are at the frontline of climate change, exacerbating existing vulnerabilities and socio-economic inequities for both mountain communities and those downstream. However, mountain communities have the capacity to adapt to these changes and mitigate the impacts of climate change. By utilizing the opportunities created by ecosystem services, mountain communities can build climate-resilience, resource security and consistent livelihoods. This publication presents and highlights the experiences using Nature-based Solutions (NbS) to build climate resilience in three mountain ranges: the Andes in South America, the Himalayas in Asia, and Mt. Elgon in East Africa. Its main objective is to provide practical information on these experiences to inform NbS practitioners, decision-makers, project designers and managers, researchers and local communities.