Mount Iriga, also known as Mount Asog or Mount Sumagang, is a dormant stratovolcano in the province of Camarines Sur, in the Philippines.
It is a andesitic stratovolcano about a kilometer from Lake Buhi. It rises with a base diameter of .
Mount Iriga, generally known for its phreatic explosions, erupted in 1628 and 1642. After these eruptions, it remained dormant.
It has a large crater at the southeast that formed due to a large flank faliure that caused a debris avalanche that buried several villages 4 kilometers away from the summit.
It is said that its alternative name Mount Asog, was named after a datu of the Agta people, named Asog, who controlled the region. However, some scholars say that "Asog" comes from the Buhinon term for a dog in heat, which is inaasog.
Mount Sumagang, the other name, is said to mean "mountain of the rising sun." Oral literature claims that it comes from the Bicol phrase "agang sumarang" which means "early to rise."
The mountain has several natural springs, which are the source of clean water for its residents and for neighboring towns.
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See also List of volcanoes in the Philippines List of active volcanoes in the Philippines List of potentially active volcanoes in the Philippines List of inactive volcanoes in the Philippines Philippine Institute of Volcanology and Seismology Iriga City
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