The Science-Policy Roundtable on Climate Change Adaptation brought together experts, policymakers, researchers and practitioners dealing with climate change policies for a two-day discussion to mark the beginning of a process of policy engagement at the sub-national level in India, Nepal, and Pakistan. Organized by the International Centre for Integrated Mountain Development (ICIMOD), the roundtable focused on the Indian Himalayan region. It aimed to identify solutions towards ‘adaptation at scale’ that are likely to emerge from a greater inter-state, upstreamdownstream and cross-country cooperation in the Hindu Kush Himalaya (HKH). The ultimate goal was to foster joint dialogue on mountain ecosystems in the context of climate change and adaptation, and to get HKH countries working together at the regional and global levels on these issues.