Arjuno-Welirang is a stratovolcano in the province of East Java on Java, Indonesia. It is a twin volcano, with the 'twins' being Arjuno and Welirang. There is at least one other stratovolcano in the area, and there are around 10 pyroclastic cones nearby. They are located in a 6 km line between Arjuno and Welirang. The Arjuno-Welirang volcanic complex itself lies in the older two volcanoes, Mount Ringgit to the east and Mount Linting to the south. The summit lacks vegetation. Fumarolic areas with sulfur deposits are found in several locations on Welirang.

The name Arjuno is Javanese rendition of Arjuna, a hero in Mahabharata epic, while Welirang is Javanese word for sulfur.

A 1950 eruption had a VEI=2. There was an explosive eruption. Another eruption occurred two years later in 1952. This eruption had a VEI=0.

A 300 hectares at slope of Mount Arjuno near the road of Surabaya-Malang is used by Taman Safari II.

Arjuna/ Welirang mountain chain in East Java consists of 4 peaks over 3,000m from the active Welirang in the west to the long dormant Arjuna in the East. This mountain is set in the ancient Mojopahit heartland and is dotted with temples, graves and other historical sites which are still visited by local folk today. The lower slopes are forested and the upper slopes are covered with tussock and a type of local alpine pine tree. The lalijiwo plateau between the twin peaks of Kembar and Arjuna is noted for deer and wild pigs. Most tracks start off in good condition but as one gets higher the tracks frequently dissappear or turn into a multitude of trails left by animals and lost hikers!

The mountain is located about 50km south East of Surabaya and it is easy to rent a taxi from Juanda (Surabaya) airport to take you to Tretes. (or anywhere else for that matter!) Tretes is a mountain resort town with lots of hotels and guesthouses to suit any budget. A good place to spend a few days chilling out. Guides, porters and supplies can be got here. There are three main routes on the mountain.

The most popular starts from the village of Tretes and follows a wide trail to the Sulphur carriers camp located at a water source between Arjuna and Welirang. From here, one can turn left and head for Lalijiwo Plateau and Arjuna or continue on to the active Welirang. Another route starts above Selecta above Batu to the South. A further route climbs directly to Arjuna from Lawang in the East.
The route described below follows the trail from Selekta to Tretes. The total walking distance of 35 km includes both peaks, the Lalijiwo Reserve and sulphur-collectors' camp. Allow 2 to 3 days, bring energy-rich foods, a water-resistantjacket and a sleeping bag. One bottle of water is sufficient-more is available up the mountain.

From Selekta either walk, or ride a motorbike, to Kampung Junggo. The trek begins among asparagus plantations. After 1.5 hours walking you enter montane forest, where a narrow footpath winds up Arjuno's western slope. This path is often hidden under thick ferns, particularly after the rainy season.
After 3 hours you should reach the top of a 100 m gorge. This is an excellent picnic spot. Keep quiet and you might see black and red monkeys on the opposite side of the canyon.

The path continues precipitously to Arjuno's peak region where some sections are as steep as 45 degrees. After another 2 hours of crawling between tall conifers you reach the tree line and an open plateau. Keep left at the turnoff: the path on the right descends to Singosari and Malang.

It's another 30 minutes from the plateau to the peaks (6 to 7 hours in all frorn Kampung Junggo). A few hundred meters below Arjuno's summit look for a big cave on your left, this is a useful spot to bivouac in bad weather. If the weather's clear when you arrive at Arjuno's summit, which lies at 3,339 rn above sea level, you get stunning views of East Java's volcanoes stretching into the distance.

A steep and arduous path leads from the summit to Lalijiwo Plateau. After 12 noon it often gets very misty along this section : sometimes you can't even see your guide walking directly in front of you. If the mist descends do not stray from the footpoth: in certain places it winds alongside a deep, invisible nothing.

Take it easy and allow two hours to reach the fairytale-like Lalijiwo Plateu. Hight meadows of alang-alang grass with muddy swamps, pools of clear mountain water, surrounded by stands of tree fern, groups of rustling casuarinas and pretty alpine flowers await you at this idyllic resting place. If you don't want to bivouac on Arjuno's icy summit or foggy Lalijiwo Plateau, make sure you leave the summit by 2 pm to ensure that you can reach Pondok Welirang, the sulphur colectors' camp, which lies at 2, 400 m.

Continue northwest after the pools at Lalijiwo and find the path with a plastic tube snaking along it. The tube provides the sulphur men with fresh drinking water, and climbers with freezing ahowers. Just follow it and 30 minutes later you enter a clearing in which lies Pondok Welirang, looking like a Tibetan mountain village.

Leave the camp before daybreak (4:30-5 am) to give you enough time to explore Gunung Welirang's craters and descend to Tretes without undue haste. From the camp start on the trail which climbs straight up. The turnoff to, the left behind the watertank leads back to Gunung Arjuno, Lalijiwo and back down to Selekta.

After ascending at a gentle 15 degrees, the rocky trail suddenly becomes steep. It climbs up onto the small Bluntu plateau, winds around some smaller peaks on the saddle between both volcanoes, and finally zigzags up Welirang's steep flank from the southeast.

Around 3 hours later you reach Welirang's flat crater complex. The first one you pass is extinct but a bit higher up is a bigger, active crater. WARNING: Do not stand on the edge of the crater rim, especially if it is still dark. Crater walls consist of porous ash and loose debris, and are often overhanging. Just a small step too far and that's it...

From the highest point (3,156 m) you can enjoy marvelous views over the region. Try to get here before 9 am, when clouds begin to travel frorn the humid lowlands and engulf the surrounding area, including you, by noon.

To witness the sulphur collectors doing their hellish work, trek back to the extinct crater. Off the main trail to the west lies a track that descends 100 m to a parasitic crater which faces the Selekta valley. This is called "the kitchen" and it is Welirang's acidic heart. Here sulphurous vapor condenses to form a yellow mass which workers gather in blocks. After carefully loading A steep and arduous path leads from the sum- their baskets they carry the sulphur down the mit to Lalijiwo Plateau. After 12 noon it often rocky serpentine paths-some only wearing slippers and smoking kretek cigarets.

To get to Tretes by public bemo, continue for 200 m beyond the gate, turn right and continue for another 200 m until you reach the Tanjung Plaza Hotel. Wait opposite it for minibuses heading for Pandaan.

If you want to continue back to Selekta, go to Pandaan and change onto another minibus to Malang (Pattimura statior-0. From there take a minibus to Batu and another one to Selekta (around 2.5 hours and Rp 20,000 in total). You'll reach your losmen much more exhausted than the sulphur-men arrive in Tretes, and you will be two kilograms lighter than when you began.

Climbing from the South (Selectar/Sumber Brantas/Cangar)
There is a quite good trail starting from the farmlands just before Cangar if coming from Batu. There is a stone 4WD road leading off to the right 1km before the mushroom factory. This trail leads up to the pass between Kembar 1 and Kembar 2 at about 2,900m. If it has been raining their may be a puddle at the top, otherwise the nearest water is at Pondok Welirang Sulphur camp about 45mins down on the tretes side. From the pass trails lead left over Kembar 1 to Welirang and the path down to the sulphur camp and right down and around to the big campsite at lalijiwo an hour or so of siddle and descent on a rather indistinct trail. Easy to get lost heading towards Arjuna and Lalijiwo so try to maintain altitude and keep contouring around until you meet the saddle before Arjuna. At this point you should pick up the more used trail from Lalijiwo to Arjuna. Follow it down to Lalijiwo and water. Better not to descend if you have not found the trail as the undergrowth gets worse as you descend. On the Cangar side be careful not to wander too far off the track because there a numerous steam vents and holes. Be careful.

Back to the beginning again...If you do not have a guide to help you find the start point try to get a ride on a 4wd heading up to the carrot and potato fields and get the farmers to point out the way. The start point is a bit hard to find if you do not know where to look but it is over to the right at the top as you descend. No real features to point to as farmers can change the landscape at will. Keep asking directions or pay someone to show you the start. The trail is overgrown but quite useable and you should be able to reach the pass in 4 hours. It took us 1-3/4 hours coming down at a reasonable clip. Easier to go in from Tretes and out from here and grab a ride into Batu once you hit the farmlands. You have a 3-4 km walk from the bushline to the road.

Duration : 4 Days 3 Nights
Grade : Medium – Moderate
Star/End : Surabaya Airport

Upon your arrival at Juanda ­ Surabaya airport (12.50), you will meet our guide team and transfer directly to Tretes Hotel for stay overnight. Lunch will be enroute at local restaurant. Dinner will be at Hotel (L,D)

After breakfast (08.00 am) you will walking to the entrance gate of Mount Arjuna. Then proceed to walk through the rocky path and jungle trek up to Pondok Welirang (4-5 hrs trekking) as the intersection between Mount Welirang and Mount Arjuna. Here, you will have a lunch. Meanwhile our porters and guide team will set up the campsite. Afterward, continue walk up to Mount Welirang (2-3 Hours). After taking some pictures, you will walking back to Pondok Welirang. Dinner will be cook by our guide and porter team. Stay over night at the Pondok Welirang Campsite. (B,L,D)

Have an early start to climb the summit of Mt. Arjuno. After enjoying sunrise (weather permits) and beautiful views we’ll have breakfast at the top of Mt. Arjuno. At 09.00 am, you will walking back to the campsite for lunch. Then proceed walking down to Tretes. Stay another night at Hotel. Dinner will be at local restaurant. (B,L,D)

Breakfast at the hotel, time is free till transfer to airport to catch return flight to Singapore (B).

Rate : USD 375/person, Twin share, Minimum 2 person

* Airport pick up and transfer
* 1 night stay in a Hotel at Tretes area based on twin share. (1st night)
* 1 night stay in a Hotel at Tretes Area based on twin share.
* English speaking mountain guide
* Mountain porters to carry our logistic, water and group equipments (tents, stove, etc)
* Meals as mentioned on above itinerary
* All entrance fee and climbing permits
* Mineral water and snack during trekking
* All transfer services in/out to Airport/Hotel * Dome tent for stay camp during trekking based on twin share
* Meals during trekking (as mention on the itinerary)

* Meals as unmentioned on above itinerary
* Tours and service as unmentioned on above itinerary
* Personal expenses such as laundry, minibar, room phone, etc
* Tips for Guide and porter
* Personal Porter to carry your personal bag
* Horse riding to Bromo caldera.

* Headlamp
* Trekking shoes
* Raincoat
* Windbreaker / Jacket
* Spare socks, clothes
* Trekking pole (optional)

Airport destination :
JUANDA International Airport at SURABAYA (SUB), East Java, INDONESIA