Mount Rinjani is an active volcano and is the second highest mountain in Indonesia after Mount Kerinci in Sumatra. There are lake Segara Anak, it has a natural hot spring, an eruption in the caldera has formed a new small cone known as the New Mount (Gunung Baru). Mount Rinjani is a very active volcano, There was a spate of activity from 1994 to 1995 which resulted in the further growth of the crater cone Gunung Baru, since renamed Gunung Barujari (Finger Mountain). On 27 April 2009 Gunung Barujari became active again with that activity continuing through to May 2009. The summit ascent routes were closed at that time as the eruptions intensified with plumes of smoke and ash as high as 8,000 m.

Mount Rinjani is the best climbed during the dry season (April-November). The trekking trails are generally closed during the rainy season. In recent years the early months of the ‘dry season’ have become more prone to rain and you should be prepared to encounter heavy rain and low visibility with slippery tracks underfoot at any time, particularly in the afternoon. It gets very cold on the mountain above 2,000 m and nears freezing at the summit. Warm clothing is an absolute must in Mount Rinjani Trekking you can see these several places are as follows:

  • Segara Anak, the crater lake.
  • Aik Kalak hot springs, at the crater rim.
  • The Mulang Pakelem. This annual Hindu ceremony at the crater lake dates from the 18th century invasion of Lombok by Balinese from the kingdom of Karangasem and attracts hundreds of participants. The lake is sacred to Hindus and the sight of hundreds of white clad Hindu pilgrims sitting and praying here is a wonderfully uplifting experience.
  • Gua Susu (Susu Cave). One of the three famous caves (Gua Susu, Gua Payung, dan Gua Manik) at Rinjani.
  • Sendanggile Waterfall, which is located in the foot of Rinjani mountain, it’s has amazing view, so you have to visit this place.

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