A volcano famed for its eerie electric-blue flames and a turquoise acid crater lake, hiked before dawn to catch the blue fire. Sulphur miners still haul loads up its slopes by hand.
8.06°S 114.24°E
April to October
1 nights
BWX
$14/night
Ijen is a volcano in far eastern Java known for two things: an electric-blue flame that appears in the dark where sulphuric gases ignite, and a turquoise acid lake in its crater. By day it is also a working sulphur mine, where miners haul slabs of yellow sulphur up the crater path on their shoulders for little pay.
This is a demanding night hike, not a casual viewpoint. You start around 1 to 2 AM, climb about 3 km uphill, and breathe air thick with sulphur fumes that sting the eyes and throat, which is why a gas mask is mandatory. Since a 2024 earthquake, the crater floor is off limits, so the blue fire is viewed from the rim. If you are fit and not put off by the smell, it is one of Indonesia's strangest mornings.
The blue flames are only visible in darkness, so timing is everything: most hikers aim to reach the rim well before about 4:30 AM. Following the 2024 earthquake, visitors view the fire from the crater rim rather than climbing down to the source. A proper gas mask (not a paper one) is essential, as gusts of sulphur smoke roll over the viewing area.
Stay on the rim after the flames fade and the acid lake reveals its milky turquoise colour as daylight grows. The contrast of the pale lake, the steaming yellow vents and the surrounding peaks is the highlight for many people. Morning light here is far better than the dark scramble that came before it.
Miners break solidified sulphur from the vents and carry loads of 70 to 90 kg up and out of the crater, often without masks, for very little pay. It is humbling to witness. Some sell small carved sulphur souvenirs at the top, and buying one is a fair way to tip them.
Tour operators usually provide one, but if you go independently you can rent a proper respirator at the base for a small fee. Do not rely on a surgical mask or a bandana, because the fumes can be genuinely overwhelming when the wind shifts. Check the filter and fit before you start climbing.
Getting there
The closest airport is Banyuwangi (BWX), about 1 to 1.5 hours by road from the Paltuding trailhead. Many travellers actually come from Bali: drive to the Gilimanuk ferry, cross to Ketapang near Banyuwangi (the ferry runs around the clock), then transfer up to Paltuding for a midnight start. Tours commonly depart Banyuwangi or Bali between roughly 11 PM and midnight. You register and pay the entry fee online via the official Ijen Blue Fire portal before arrival.
Best time to visit
April to October, the dry season, gives the safest footing and clearest views; the blue fire shows best on dark, dry nights. Avoid the wet months around December to March when the trail turns slick and clouds often hide the lake. Note the crater is typically closed on the first Friday of each month.
Where to stay
Most people sleep in or near Banyuwangi town before the midnight start, where simple hotels and guesthouses run roughly 15 to 40 USD, with a few nicer options closer to the coast. Some skip sleep entirely and come straight from Bali on an overnight tour.
No. Since the 2024 earthquake, descending to the crater floor has been prohibited, and the blue fire is now viewed from the rim. Always follow current ranger instructions, as access rules can change with volcanic conditions.
Moderately hard: about 3 km of steady uphill on a wide track, taking most people 1.5 to 2 hours, done in the dark at altitude. It is the sulphur fumes and the early start, more than the distance, that catch people out.
The trail is wide and easy to follow, so fit, experienced hikers sometimes go independently. That said, a guide handles the gas mask, timing and transport logistics, and many find that worth it for a 1 AM start in fumes.
Build a route across Indonesia in minutes. We work out the travel time and cost between every stop, then a local turns it into a trip.
Build your tripOn the steep uphill section, local porters offer to pull or push you in a two-wheeled cart for a negotiated fee. It is pricey and a little awkward given the miners' own loads, but it is an option if altitude or fitness is a concern. Agree the price in writing before you set off.
Ijen sits near Bali, so many travellers chain it with Bromo into a two or three day East Java overland loop. The classic order is Bromo first, then a long transfer east to Ijen, then the short ferry hop to Bali. It is tiring back-to-back but efficient if your time is short.
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