Mount Tongkoko or Mount Tangkoko is a stratovolcano in the north of Sulawesi, Indonesia. Its summit has an elongated deep crater. On the east flank there is a flat lava dome Batu Angus. Historical records only show eruptions in the nineteenth century. The Tangkoko Nature Reserve is a refuge for such species as the Celebes crested macaque and spectral tarsier. See also List of volcanoes in Indonesia References Stratovolcanoes of Indonesia Active volcanoes of Indonesia Mountains of Sulawesi Volcanoes of Sulawesi Landforms of North Sulawesi Holocene stratovolcanoes