Mount Agung, Stratovolcano in Karangasem, Indonesia.

Mount Agung is an active stratovolcano in Rendang district, Karangasem Regency, Bali, Indonesia, and the highest point on the island at 3,142 metres. It has a large, deep crater that sometimes releases smoke and water vapour. Seen from Pura Besakih it looks like a perfect cone, but its summit is actually elongated and ends in a wide, circular crater.

The first recorded eruption, in 1710–1711, is documented in the Babad Gumi and other Balinese lontar, which note hot water damaging villages. After eruptions in 1808 and 1843, the 1963 event reached VEI 5, sent debris 8–10 km up and killed an estimated 1,100–1,500 people; lava flows stopped just short of Besakih temple. Activity returned in 2017–2019, forcing about 122,500 evacuations in September 2017.

The mountain is considered the home of gods in Balinese tradition, and its name translates to great mountain in the local language. Many residents regard it as the spiritual center of the island, which shows in the way temples and houses are often oriented toward it.

The national disaster management center sets up exclusion zones during periods of heightened volcanic activity that often span several kilometers around the summit and restrict access. Visitors should check current warnings and instructions from local authorities before exploring the area.

The volcano creates two different climate zones on Bali: the south receives much more rainfall, while the north stays drier in the rain shadow. This division influences agriculture and daily life for residents on both sides of the mountain.