Why the flames are blue, when to go, and what the health screening involves.
The famous blue fire of Kawah Ijen is not lava. It is sulfuric gas escaping from cracks in the crater at very high temperatures and igniting as it meets the air, burning with an electric-blue flame that is only visible in darkness.
When to go
The hike starts from Paltuding around 1 a.m. so you reach the crater before first light. The dry season (April–October) offers the most reliable conditions.
The health screening
The conservation agency (BBKSDA) requires visitors to be fit for the gas environment. Our licensed physician checks your blood pressure and general condition the evening before. Guests with asthma or serious heart conditions may not be allowed into the crater area.
Safety on the trail
- Always wear the gas mask we provide when the wind turns
- Stay with your guide — descent to the crater floor depends on daily PVMBG clearance
- Move slowly; the 3 km trail is steep in the final section
Blue fire depends on weather and gas levels, so it can never be guaranteed — but the sunrise over the turquoise acid lake is spectacular either way.
- #Ijen
- #Blue Fire
- #Safety
