rinjani4dIn 1257, Mount Samalas, the precursor to Mount Rinjani, experienced a catastrophic eruption, one of the most powerful in recorded history. This caldera-forming event reshaped the landscape,Rinjani 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