Mountain wetlands are critically important ecosystems that provide locally and globally significant social, economic, and environmental benefits. Wetland inventorying is a key activity underpinning planning for sustainable use of wetlands and their resources and biodiversity. This manual provides an explanation and the practical tools and step-by-step guidelines for preparing an inventory of wetlands in the Hindu Kush-Himalayan region, prepared under a project supported by the Asia Pro Eco programme of the European Commission, and is a development of the Wetlands International ‘Manual for an Inventory of Asian Wetlands’. It has been developed to assist governments, professionals, and the public to identify wetlands of importance and help in prioritising their conservation, and to support informed decision making on wetland management.