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Ijen Crater Travel Guide: Explore the Magical Blue Fire in East Java

4.9 (78 reviews) East Java, Indonesia
Overview Weather Activities Tips
Aerial view of Ijen Crater in Indonesia, showcasing its rugged terrain and volcanic landscape under a clear blue sky.
A woman seated on a tree branch at the top of Ijen overlooking a serene lake, surrounded by nature's tranquility.
A couple stands triumphantly on a Mount Ijen peak, arms raised in celebration against a breathtaking landscape.

Introduction to Ijen Crater

Located in East Java, Indonesia, Ijen Crater is an active volcano that boasts a surreal turquoise sulfur lake and is home to the world’s largest acidic crater lake. One of its most remarkable features is the Blue Fire phenomenon, a natural wonder caused by ignited sulfuric gases that can only be seen in a few places around the world. 

Interesting Fact:

Ijen stands at an altitude of 2,799 meters (9,183 feet) above sea level. Its unique feature is the rare Blue Fire flames, visible at night. Additionally, Ijen is famous for its traditional sulfur miners who carry heavy loads from the crater.

How to Get to Ijen Crater

Location:

Ijen is accessible via two main towns: Banyuwangi and Bondowoso.

Pro Tip

Start your trek around 2:00 AM to catch the Blue Fire before sunrise and enjoy panoramic views afterward.

Best Time to Visit Ijen Crater

The Ijen Crater trek is open year-round, but the best time to visit is during the dry season (April to October) for clear skies and safer hiking conditions

Dry Season (April - October)

  • Best for hiking and witnessing the blue fire phenomenon with minimal weather disruptions
  • Clearer trails and safer conditions, making the 3 km hike more manageable
  • More comfortable temperatures for trekking, especially at night

Rainy Season (November – March)

  • Trails become muddy and slippery, increasing the difficulty of the ascent
  • Risk of thick fog and limited visibility, reducing chances of seeing the blue fire and crater lake

Average Temperature:

  • Daytime: 10°C – 20°C (50°F – 68°F)
  • Nighttime: 5°C – 12°C (41°F – 54°F)

Recommended Time:

The best time to visit Mount Ijen is between midnight and early morning (12 AM – 6 AM) to witness the blue fire phenomenon before sunrise and enjoy cooler temperatures for trekking. Arriving at the crater by 4-5 AM provides the best lighting for photography and a stunning view of the turquoise crater lake before fog or sulfur gas reduces visibility.

Current Weather Conditions

Humidity
Wind
UV Index
Rainfall
-- mm
Precipitation
Feels Like

7-Day Forecast

Today
Now
28°
Thunderstorm
Thu
27°
Fri
30°
Sat
28°
Sun
29°
Mon
28°
Tue
29°

Current Trail Conditions: Moderate

Some paths may be slippery due to recent rainfall. Exercise caution when descending to the base of the waterfall.

Trail Conditions & Situational Overview

The trek to Mount Ijen is moderately challenging but highly rewarding, offering breathtaking views of the blue fire phenomenon, turquoise crater lake, and vast sulfur mines. The trail is steep and dusty, requiring a good level of fitness, especially for night hikers.

Trail Overview:

Easy

Starting Trail (Entrance to Initial Ascent)

The first 600 meters from the ticket entrance is relatively flat and easy before the incline begins.

Moderate to Hard

Main Hiking Trail (After the First 600 Meters)

The trail starts to incline steeply, with a 3 km ascent (~1.5 to 2.5 hours) towards the crater rim.

Advanced

Crater Descent to the Blue Fire

A 45-minute steep and rocky descent from the crater rim to the sulfur mine.

Trail Features:

Length
~7 km round-trip (Paltuding Base Camp → Crater Rim → Blue Fire → Return).
Elevation Gain
536 meters (1,759 feet) from base camp to the crater rim.
Estimated Duration
4-6 hours round-trip, depending on fitness level and time spent at the crater.

Trail Conditions:

  • The main trail is steep, dusty, and exposed, requiring steady pacing and a headlamp for night hikes.
  • The crater descent is highly technical, with loose rocks and toxic sulfur fumes—a gas mask is required.
  • During the rainy season, paths become muddy and more challenging, with increased fog reducing visibility.
  • Proper hiking shoes, warm clothing, and protective gear (gas mask, gloves) are essential for a safe trek.

Things to Do at Ijen Crater

Mount Ijen is famous for its rare blue fire phenomenon, one of the few places in the world where sulfur gases ignite at over 600°C (1,112°F), creating an eerie blue glow. It is also home to the largest highly acidic crater lake in the world, with a stunning turquoise color and a pH close to 0.5.

Witness the Blue Fire Phenomenon

Witness the Blue Fire Phenomenon

See one of the world’s rarest natural wonders—blue flames from burning sulfuric gas—best viewed between 2:00 AM – 4:00 AM. A gas mask and guide are essential for safety.

Watch the Sunrise from the Crater Rim

Watch the Sunrise from the Crater Rim

Catch a breathtaking sunrise with panoramic views of the turquoise lake and surrounding volcanic peaks—perfect for photography lovers.

Hike the Ijen Crater Trail

Hike the Ijen Crater Trail

A 3 km trek (moderate difficulty) through volcanic terrain, offering stunning views of the crater and surrounding landscape.

Capture Stunning Photos

Capture Stunning Photos

Spend the night under the stars before your trek—perfect for early starts and peaceful nature vibes.

💡

Fun Fact

Mount Ijen is famous for its rare blue fire phenomenon, one of the few places in the world where sulfur gases ignite at over 600°C (1,112°F), creating an eerie blue glow. It is also home to the largest highly acidic crater lake in the world, with a stunning turquoise color and a pH close to 0.5.

Travel Tips for Visiting Ijen Crater

Operating Hours

7:00 AM – 12:00 PM (daily)

What to Bring

Essential Items

  • Warm clothing (it gets cold at night)
  • Comfortable hiking shoes with good grip
  • Gas mask & trekking pole (provided)

Also Recommended

  • Headlamp or flashlight for night trekking
  • Small backpack with water and snacks
  • Camera for capturing the Blue Fire and stunning landscapes

Safety Tips

  • We would provide a local guide for safety and insights.
  • Carry enough water and light snacks.
  • Respect the local sulfur miners and maintain a safe distance.
  • Check weather forecasts before planning your trip.
  • Follow all signs and safety regulations on the trail.

FAQs about Ijen Crater

Yes, but it’s highly recommended to hire a local guide and wear a gas mask due to sulfur fumes.

The hike is moderate and suitable for most travelers with a basic fitness level.

No, the Blue Fire phenomenon is only visible at night due to the lack of daylight.

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