The geographic feature that forms the northern boundary of the Himalayan Mountain Range is the Tibetan Plateau. Also known as the "Roof of the World," this extensive high-altitude region lies at an average elevation of over 4,500 meters. The plateau plays a crucial role in the region's climate and ecology, affecting rainfall patterns in surrounding areas. Additionally, the Tibetan Plateau is significant for its unique biodiversity and as the origin of several major rivers, including the Brahmaputra, Indus, and Yangtze rivers, making it vital for both environmental and cultural studies.