Advocacy Strategies and Approaches: A Training of Trainers Manual on Advocacy Strategies for Community-based Organisations in the Hindu Kush-Himalayas, and its companion Resource Manual, were developed for potential trainers of community-based organisations (CBOs) in the HKH region. The manuals are intended to provide useful guides for conducting regional and local-level training on advocacy applicable to a variety of mountain development issues and themes. The Resource Manual provides trainers with more in-depth material on subjects discussed in the training manual. The manuals attempt to provide clarity on the concept of advocacy and to help equip CBOs and their networks with tools, strategies, and techniques that will help them assist mountain people to advocate for appropriate strategies to address their social, economic, gender, and other issues, and to articulate their needs and perspectives to governments, policy makers, and development organisations. The manuals are also likely to appeal to development practitioners and others interested in promoting people-centred, sustainable mountain development.