Mount Rinjani 3-day itinerary

Check in at the Rinjani Trek Centre at 7am with your guide and porter team. The trail starts in dense tropical forest — towering mahogany, fig trees draped in moss, and a chorus of unseen birds. The first section to Pos 1 (1,500m) is gentle, following a well-worn path through the canopy with occasional views of the ocean below. The forest is home to black ebony leaf monkeys and Lombok's endemic Rinjani scops owl, though the owl is nocturnal. Push on to Pos 2 at 2,000m where the forest thins into open grassland and your porter prepares a hot lunch of nasi bungkus and fresh fruit.

The trail from Pos 2 to Pos 3 (2,639m) is the most demanding section — a relentless 600-metre climb through scrubby alpine vegetation with increasingly loose volcanic gravel underfoot. The scenery transforms dramatically as you climb above the treeline into a landscape of grey volcanic rock and stunted bushes. Every rest stop reveals bigger panoramas — Lombok's rice paddies far below, the ocean stretching to Sumbawa, and the smoking cone of Barujari inside the crater becoming visible. Your legs will burn but the views sustain you through every step of this magnificent ascent.

Arrive at Pos 3 on the crater rim and the reward is instant — a jaw-dropping panorama of Segara Anak crater lake, 600 metres below, its turquoise waters filling the ancient caldera. The active Barujari cone rises from the lake, occasionally puffing sulphurous smoke. Your porter sets up camp and prepares dinner while you sit on the rim watching one of Indonesia's greatest sunsets — the sky turns orange and pink behind Mount Agung on Bali while the crater lake glows in the fading light. Stars appear in extraordinary density at this altitude.

Wake at 4:30am for sunrise from the crater rim — watching the first light illuminate the crater lake from above is transcendent. The water shifts from black to deep turquoise as sunlight floods the caldera. After sunrise breakfast, begin the steep 2-hour descent to Segara Anak crater lake at 2,000m. The trail drops through volcanic scree and requires careful footwork. At the lake, the atmosphere changes completely — sheltered from wind, surrounded by towering caldera walls, and utterly peaceful. The lake is sacred to the Sasak people, who hold an annual ceremony here to offer gold to the spirits.

Trek 30 minutes around the lake shore to the natural hot springs — volcanic vents heat several pools to a perfect 38–40°C. Soaking your aching muscles while gazing up at the 3,726-metre summit above and the crater walls around you is one of the most surreal bathing experiences anywhere. The mineral-rich water is believed to have healing properties by locals. After the hot springs, explore the lakeshore — you can fish for tilapia with a simple line (your guide may have one) and your porter will cook them for dinner. Camp by the lake in the sheltered caldera.

Your guide will brief you on the 2am summit push — the most physically demanding section of the trek. The route climbs 1,700 metres from the lake to the 3,726-metre summit in approximately 4 hours. Dinner is served early — high-carb rice and noodles for energy — and you should be in your sleeping bag by 7pm. The caldera creates its own microclimate and nights by the lake are warmer than the rim, but still cold. Listen to the occasional rumble from Barujari across the water and watch shooting stars through the gap in the caldera walls. Rest well — tomorrow is the big one.

The 2am alarm rings in the freezing darkness. Headlamps on, you begin the brutal ascent from the crater lake up the inner caldera wall — the steepest terrain of the entire trek. The trail is loose volcanic sand and scree where you slide back half a step for every step forward. It is physically exhausting but the pre-dawn sky is ablaze with stars and the Milky Way stretches overhead. After 3–4 gruelling hours, you reach the summit of Mount Rinjani at 3,726 metres — the second-highest volcano in Indonesia. The sunrise from the top reveals Lombok, Bali, Sumbawa, and the ocean in every direction.

After celebrating at the summit and taking photos in the golden morning light, begin the long descent. You will retrace back to the crater rim and then follow the original trail down through Pos 3, Pos 2, and Pos 1 back to Senaru. The descent is faster but hard on the knees — the total drop is over 3,100 metres. The forest section near the bottom is a welcome return to shade and birdsong after the exposed volcanic terrain above. Most trekkers reach Senaru by mid-afternoon, exhausted but elated. Your guide and porters deserve a generous tip for their extraordinary effort.

Back in Senaru, a hot shower has never felt better. Most guesthouses have simple but clean rooms for Rp 150,000–250,000 ($10–16). Celebrate your achievement with a big meal — nasi campur, satay, and cold Bintang beer at a village warung. If you have energy left, arrange transport to the Gili Islands or Kuta Lombok for beach recovery the next day. The shuttle to Bangsal harbour (for Gili fast boats) takes about 2 hours and costs Rp 100,000 by shared van. Rinjani will have tested your limits — but the memories of that crater lake sunrise will last a lifetime.