Mount Rinjani rises 3,726 meters above Lombok, the second-highest volcano in Indonesia and a sacred peak in Sasak and Balinese cosmology.
The mountain's name derives from ancient Javanese, though local Sasak communities call it Samalas — the name of the cone that collapsed in 1257, producing one of the largest eruptions in human history. That event carved the six-kilometer caldera now cradling Segara Anak, the crescent lake whose turquoise waters reflect the newer summit cone and feed hot springs along the eastern shore.
Mount Rinjani tour 2 days expeditions follow two primary routes: the Sembalun approach from the east, ascending through savanna and montane forest to the crater rim at 2,639 meters, and the Senaru route from the north, steeper and forested, reaching the rim via a different ridgeline. Both converge at campsites along the caldera edge. Summit attempts begin near midnight, climbing 1,100 vertical meters of loose scoria and volcanic ash to reach the peak by dawn. The caldera itself was designated part of Gunung Rinjani National Park in 1997, protecting 41,330 hectares of transitional rainforest, endemic ebony stands, and the critically endangered Rinjani flying fox.
The conservation fee of 250,000 IDR per person per day funds trail maintenance, porter welfare programs, and reforestation efforts after a 2018 earthquake damaged sections of both ascent routes. Repairs reopened the mountain in 2019 with reinforced campsites and expanded water sources. Park gates at Sembalun Lawang and Senaru Crater Rim open daily from 07:00 to 19:00, with check-in closing at 15:00; trekkers arriving after 13:00 risk insufficient daylight to reach the rim safely. Two-day itineraries typically camp once at the crater rim, allowing time for the summit push or a descent to the lake's thermal springs before exiting via the opposite trailhead.
Rinjani's prominence draws nearly 30,000 trekkers annually, though numbers fluctuate with seismic activity — the volcano remains actively monitored by Indonesia's Center for Volcanology and Geological Hazard Mitigation. The Sembalun route gains elevation rapidly across open terrain, exposed to wind and equatorial sun. Senaru offers more shade but requires scrambling over exposed roots and rock steps. Both demand acclimatization; altitude sickness becomes common above 2,800 meters. The two-day format compresses the ascent, prioritizing the rim experience and optional summit over the three-day circuit that includes lake exploration and spring immersion.
48 hr
