rinjani4dABOUT US. We specialize in organizing trekking expeditions to Mount Rinjani, as well as tours around the island of Lombok. We help maintain a reliable team of travel guides, consistentlyRinjani Trekking 4D3N Summit Duration: 4 Days 3 nht Starting Point: Sembalun 1156 M Finish: Senaru 600 M Campsite: Sembalun Crater 2639 M, Lake 2000 M, Senaru Crater 2641 M