Lake Segara Anak an altitude 2.000 meter of Mount Rinjani

Lake Segara Anak an altitude 2000 meter of Mount Rinjani

Lake Segara Anak an altitude 2000 meter asl of Mount Rinjani

The majestic Segara Anak lake filling the caldera of Rinjani volcano.

The cinder cone is Gunung Baru (new mountain). The lake covers an area of 11km2 and its volume was (before the eruption) estimated at 1.02km3. This is probably the largest hot volcanic lake in the world. The lake elevation is 2000 meters asl. Segara Anak is a crater lake contained within Mount Rinjani on the island of Lombok in Indonesia. The name Segara Anak means child of the sea given to the blue color of the lake reminiscent of the sea. The lake is heated, so its temperature is 20-22 °C, about 5-7 °C above the expected temperature for a lake in that altitude. At the west end of the lake is the volcanic cone Gunung Baru, giving to the lake a crescent shape.

Segara Anak Lake is a stunning crater lake nestled within the volcanic caldera of Mount Rinjani on Lombok Island, Indonesia, known for its striking blue waters, active volcano, and rich cultural and natural significance.

Location and Formation

Segara Anak, meaning "Child of the Sea" in the local Sasak language, is a crater lake formed inside the caldera created by the massive eruption of Mount Samalas in 1257. It lies at an elevation of about 2,004 meters (6,575 feet) above sea level on Lombok Island, West Nusa Tenggara. The lake covers roughly 11.3 square kilometers (4.4 sq mi) with a maximum depth of around 200 to 230 meters. An active volcanic cone, Gunung Barujari, rises from the lake’s eastern end, creating its distinctive crescent shape.

Unique Natural Features

The lake’s water temperature ranges from 20 to 22°C (68 to 72°F), unusually warm for its altitude, due to magma flow beneath the lakebed. This geothermal activity also fosters hot springs nearby, where hikers often relax after trekking. The lake has a neutral pH of 7 to 8, influenced by hydrothermal fluids mixing with rainwater.

Activities and Trekking

Visiting Segara Anak requires trekking Mount Rinjani, which usually takes around three days and two nights. The trek leads through diverse landscapes—rainforests, rocky terrains, and mountain vistas—rewarding visitors with breathtaking views. At the lake, tourists can enjoy fishing, as it is now stocked with tilapia and carp introduced since the late 20th century.
Nearby hot springs provide a natural spa experience, and there are also small waterfalls and caves around the lake. Camping around Segara Anak is popular, offering tranquil nights under starry skies.

Cultural and Spiritual Significance

The local Sasak people hold the lake in deep respect, viewing it as a spiritual site. Annual rituals and pilgrimages occur, and the lake features prominently in local myths and customs. One traditional ceremony performed on the lake’s shores is called Pancaka Mulang Pekelem, held by the Hindu community every November.

Historical Impact

The caldera that houses Segara Anak was created by one of the largest volcanic eruptions in recorded history. The 1257 eruption of Mount Samalas was so powerful that it likely influenced global climates and may have contributed to the onset of the Little Ice Age.

Practical Information

The trek can start from Senaru or Sembalun villages on Lombok.
The path down to Segara Anak involves steep, sometimes slippery sections, suitable for hikers with a good fitness level.
The lake area includes camping grounds and basic facilities.
Best times to visit are early mornings for mist-covered, magical views.
Trekking guides are recommended for safety and cultural insights.

Segara Anak offers a compelling blend of natural beauty, adventure, and cultural heritage, making it a must-see destination on Lombok Island for trekkers and nature enthusiasts alike. It promises an unforgettable experience of Indonesia’s volcanic wilderness and local traditions.

This photo Lake Segara Anak altitude 2.000 masl

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Lake Segara Anak an altitude 2000 meter of Mount Rinjani