Davao Province, Mindanao, Philippines
6.987 N, 125.273 E
summit elevation 2954 m
Apo is the highest mountain in the Philippines. The volcano has three peaks. The highest is in the SW and contains a 500 m wide crater.
The summits and crater are covered with stunted vegetation. The volcano is part of the Central Mindanao Arc.
Apo volcano is composed mainly of basaltic flows overlain by more recent andesites in its northeastern side.
Fumarolic activity at is present at Apo Volcano on the SE side above 2400 m elevation. A fumarole is found on western slope. The amount of sulphur at the volcano was measured at 500-1000 tons in 1924.