Hike through rainforest to the rim of Mount Ijen and witness sulfur’s eerie blue flames under a starlit sky, then watch sunrise paint the acidic crater lake. This overnight trek blends long transfers with a short, steep ascent—perfect for travelers who want nighttime spectacle and sunrise panoramas.
More ways to explore the area's outdoor wonders
You arrive under a scatter of stars, the engine lullaby of an overnight transfer cutting through the island air as Java draws near. By the time the ferry slides into Ketapang the world is darker, and the rainforest on Ijen’s slopes waits like a living wall. The trail begins in cool shadow—ferns brushing shoulders, the path grading steeper—and the climb feels like negotiating a sleeping giant’s ribs.
Difficulty
moderate
Duration
30–32 hours (overnight trip including transit; 1.5–3 hours ascent)
Fitness Level
Suitable for travelers with moderate fitness; expect steep sections and unstable volcanic scree—those with heart or back issues should not attempt it.
Wildlife
History
Ijen’s crater has been mined for sulfur for decades; miners still extract and carry sulphur baskets down steep pathways, a demanding local livelihood.
Conservation
The crater lake is highly acidic and fragile; follow marked trails, avoid littering, and use masks to reduce health impacts from sulfur exposure.
Reserve your spot on the Mount Ijen Volcanic Crater Overnight Trip from Bali today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Bring a warm, windproof layer
Crater rim temperatures can drop sharply—carry an insulated jacket to stay comfortable during the pre-dawn wait.
Use a strong headlamp with spare batteries
The trail is dark and uneven before dawn; hands-free lighting improves footing and keeps your group visible.
Wear grippy hiking shoes
Steep volcanic scree and muddy sections demand shoes with good traction and ankle support.
Protect against sulfur fumes
Carry a P2/N95 mask—sulfur gas can irritate lungs, especially close to active vents and the miners’ work area.
Sturdy hiking boots
Provide traction on steep, rocky and muddy trail sections.
Insulated, windproof jacket
Keeps you warm during the cold pre-dawn wait at the crater rim.
Headlamp with spare batteries
Essential for navigating the trail in darkness and hands-free lighting.
P2/N95 particulate mask
Reduces inhalation of sulfur fumes near active vents and the crater floor.