About This Experience

Mount Kawah Ijen is an active volcano in East Java, famous for its electric-blue flames that burn in the crater at night — caused by igniting sulphuric gases escaping from the vents. The crater holds the world's largest highly acidic lake, a stunning turquoise pool surrounded by yellow sulphur deposits and wisps of smoke. It's also where local miners carry impossibly heavy loads of raw sulphur up from the crater floor.

What to Expect

The hike starts in the dark, typically around 1am, to reach the crater rim in time to witness the blue flames before dawn. The trail is about 3 kilometres with a steep final ascent. At the top, you'll descend into the crater to see the blue flames up close and watch the sulphur miners at work. As the sun rises, the crater lake transforms into a brilliant turquoise — a surreal and unforgettable sight.

Practical Tips

• The hike starts very early (around 1am) — arrange transport from Banyuwangi the night before
• Bring a gas mask or cover your nose and mouth — sulphur fumes are strong near the crater
• Wear warm layers — temperatures drop significantly at altitude
• A headlamp is essential for the pre-dawn ascent
• The descent into the crater is steep and slippery — wear sturdy shoes with good grip
• Guides are available and recommended for safety