Mount Leuser is one of three prominent peaks on the Leuser Range in the Indonesian province of Aceh. The range lies to the south and west of the Alas River that flows east from the Gayo highlands of central Aceh before turning south through Karo Batak country in North Sumatra province. The Leuser region is of ancient uplifted formations - it is non-volcanic. The region is billed as the largest wilderness area in South-East Asia.
This entry establishes the names, altitudes, locations and prominence of the three peaks, 'Tanpa Nama', Loser and Leuser, on the Leuser Range. It is often assumed, incorrectly, that the highest peak is Mount Leuser when in fact it is Mount 'Tanpa Nama'. Mount Leuser is the lowest of the three peaks.