The park covers an area of 41,330 ha on the northern part of Lombok. At 3726m it is the second highest volcano in Indonesia, part of the infamous ring of fire that encircles the basin of the Pacific.
It is surrounded by further 66,000 ha of Protection Forest also covers the three administrative districts. The park ecosystem is in the transitional zone between Asia and Australia (Walaceae zone). Average rainfall is about 3,000mm annually.
Gunung Rinjani is rich in variety of flora and fauna and vegetation types. On the south western side of the mountain is the most eastern extent of primary rainforest of Nusa Tenggara. This give away monsoon forest and drier climate in the east, and savannah in the north east. Note, flora includes the everlasting edelweiss flower (Anaphalis Viscida), tiger orchid, alang-alang grass (Imprerata Cylindrical), cemara trees (Casuarina Trifollia and Caruarina Ocidentale).
For the people of Lombok Sasak and Balinese alike, the volcano is revered as a sacred place and the abode of God. Within the spectaculer crater, Segara Anak Lake is the destination of many pilgrims who place offerings in the water and bathe away disease in the nearby hot springs.