D3.3 - Activity Programme for the Community of Practice describes the MountResilience Community of Practice (CoP) on Climate Change Adaptation, a mutual-learning platform designed to bring together stakeholders from mountain regions. The CoP’s primary goal is to foster knowledge exchange, enhance capacity building, provide a platform for policy consultation, and facilitate networking to advance climate change adaptation in such regions. By creating a space for regular interaction among key actors, the CoP seeks to build a collaborative community dedicated to addressing the specific climate challenges faced by mountain areas.The CoP's implementation will unfold in three phases. Phase 1 (September 2024 - January 2025) will focus on reviewing existing initiatives, such as the Mountain Adapt-emy and Inter-Cross Pollination (ICP) programmes, and mapping potential stakeholders. Phase 2 (January 2025 - May 2025) will involve recruiting CoP members and designing a tailored activity programme based on their interests and needs. Phase 3 (June 2025 - February 2028) will focus on executing the activity programme, with a series of sessions and events throughout this period. D3.3 also provides detailed information on the initial CoP sessions that will be organised in 2025, which have been aligned with the interests of the CoP members and with the ongoing activities of the Inter-Cross Pollination (ICP) and Mountain Adapt-emy programmes. To ensure that the CoP remains relevant to its members and project partners, the programme of activities will be updated annually (2026 and 2027) through surveys and consultations, giving them the opportunity to suggest new topics or on-demand sessions.