Langtang is a narrow valley that lies south of the Tibetan border. It lies between the main Himalayan range to the north and a lower range of snowy peaks to the south. Langtang Lirung (7,246 m) dominates the valley to the north. Gang Chhenpo (6,388 m) and Naya Kangri (5846m) lie to the south, and Dorje Lakpa (6,966 m) protects the east end of the valley.
The Langtang National Park contains the Langtang valley, the Langtang Lirung peak, and the Gosainkund. Gosaikunda is a chain of sacred lakes (to which there is an annual pilgrimage in August). The park is home to musk deer, Himalayan black bears, common leopards, red pandas, and snow leopards. But it is particularly noted for its birds and flowers. Trails will lead through evergreen forests and pass rivers, lakes, waterfalls, and even a glacie. This high and isolated region is inhabited by Tamangs. However, their religious practices, language, and dress are much more like those of Tibet than those of the Middle Hills.