Mount Sibayak

Mount Sibayak (Indonesian: Gunung Sibayak) is a stratovolcano overlooking the town of Berastagi in northern Sumatra, Indonesia. Although its last eruption was more than a century ago, geothermal activity in the form of steam vents and hot springs remains high on and around the volcano. The vents produce crystalline sulfur, which was mined on a small scale in the past. Seepage of sulfurous gases has also caused acidic discolouration of the small crater lake.

Mount Sibayak
Gunung Sibayak (Indonesian) Deleng Sibayak (Karo)
Sibayak seen from the Southeast
Highest point
Elevation	2,181 m (7,156 ft)
Listing	Ribu
Coordinates	3°14′21″N 98°30′20″E / 3.23917°N 98.50556°E / 3.23917; 98.50556
Geography
Mount Sibayak Sumatra, Indonesia
Geology
Mountain type	Stratovolcano
Last eruption	1881

Sibayak is a term from the Karo Batak language referring to a founding community. Mount Sibayak is relatively easy to climb and has been a tourist attraction since colonial times.

• 
  Crater of Gunung Sibayak. Mount Sinabung in the back.
• 
  Mount Sibayak in the 1920s
• 
  The "Sibajak raja berampat", the so-called four princes with their wives, Karolanden, North Sumatra (1914–1919)

On July 11, 1979, a Fokker F28 operating under Garuda Airlines crashed in Mount Sibayak.