day.1 After an early breakfast,we depart Senaru and travel by 4WD vehicle to Sembalun for Rinjani trekking.We register at the Rinjani Trek Centre in Sembalun (1,156 m) before commencing our trek. The trail initially passes through undulating open grasslands as it winds up the mountain. We stop at Pos 1 and Pos 2,pausing for rest breaks and snacks. At Pos 3 (1,800 m) we stop for a longer break for lunch. After lunch, we commence the steep climb up the crater rim. We camp the night at Sembalun Crater Rim (2,639 m) with amazing views of the sunset, Lake Segara Anak, the summit of Mount Rinjani,and northern Lombok.