07;00 am After an early breakfast we depart Senaru and travel by 4WD vehicle to Sembalun.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.

We wake at 2 am for a light breakfast before commencing the challenging three hour trek to the summit (3,726 m).We arrive in time for sunrise, the best time to enjoy the spectacular views. Returning to our campsite on the crater rim we pause for a hot breakfast and a rest before continuing our descent into the crater. We stop for lunch on the shore of Lake Segara Anak (2,000 m) and set up camp. The afternoon can be spent swimming in the hot springs, fishing, exploring the lakeshore or simply relaxing.

After breakfast we continue our trek around the shore of Lake Segara Anak before commencing our climb out of the crater. The trail is steep and rocky and passes through dense forest. At the Senaru Crater Rim (2,641 m) we pause for lunch and a rest. The crater rim offers views across the lake back toward the summit and a good vantage point of Gunung Baru, the small volcanic cone within the crater of Mount Rinjani. Mount Agung in Bali and the Gili Islands can also be seen from here. We can camp here for the night, or if the wind is cold and we still feel energetic we can continue down the mountain and spend the night at a more sheltered campsite in the forest.