Rinjani 4D3N Trek Itinerary: The Full Four-Day Route

Quick answer: The Rinjani 4D3N trek is the longest itinerary Mount Rinjani National Park permits — four days, three nights. You climb from Sembalun, summit Rinjani at 3,726 m, descend to Segara Anak lake and the Aik Kalak hot springs, then exit via Senaru. GumilangTour runs it as a private trek from Lombok; pricing is confirmed on enquiry.

Table of Contents

• What "4D3N" actually means on Rinjani
• How much do the park permits cost for a 4D3N trek?
• The Rinjani 4D3N itinerary, day by day
  • Day 1 — Sembalun trailhead to Plawangan Sembalun (approx. 6-8 hours)
  • Day 2 — Summit push to 3,726 m, then down to Segara Anak
  • Day 3 — The hot springs day, then up to Plawangan Senaru
  • Day 4 — Senaru rim down to Senaru village (approx. 5-7 hours)
• 3D2N vs 4D3N: what the fourth day actually buys
• The risk almost nobody prices in: the lake link can close
• Dry-season fire risk is a live 2026 issue at your camp
• How fit do you need to be for a Rinjani 4D3N trek?
• When is Rinjani open, and how do you book the permit?
• Should you book the 4D3N or the 3D2N?

What "4D3N" actually means on Rinjani

Most trek pages present the Rinjani 4D3N as the deluxe, take-your-time version of the 3D2N. That is half right. What it really is: the longest trek Rinjani National Park will let you book.

Mount Rinjani National Park (TNGR) raised the maximum permitted climbing duration from three days and two nights to four days and three nights, acting on a letter from the Director General of KSDAE (No. S.436/KSDAE/PJLKK/KSA.3/4/2022) and implemented from 4 May 2022. The park's wording is explicit: "penambahan durasi pendakian dari sebelumnya 3 hari 2 malam menjadi 4 hari 3 malam."

That single line reframes the whole decision. There is no 5D4N. If you want to summit Rinjani and sleep at Segara Anak lake and avoid a twelve-hour final day, 4D3N is not one option among several — it is the only itinerary shape that fits inside the rules. Anyone selling you five days on the mountain is either splitting the trip around a night outside the park or is not describing a legal permit.

How much do the park permits cost for a 4D3N trek?

Rinjani National Park entrance fees are charged per person, per day — not once per trek. A four-day permit therefore costs twice what a two-day permit costs, and this is the single most common budgeting error GumilangTour sees in enquiries.

Under Peraturan Menteri Kehutanan No. 17 of 2025, effective 3 November 2025, TNGR publishes these rates (checked August 2026 on the park's own tariff announcement):

Run that against trip length and the picture changes:

• 2D1N on Sembalun: 2 days x IDR 250,000 = IDR 500,000 per foreign trekker
• 3D2N on Sembalun: 3 days x IDR 250,000 = IDR 750,000
• 4D3N Sembalun in, Senaru out: 4 days x IDR 250,000 = IDR 1,000,000

So the fourth day is not free comfort. It adds a full day of park fee on top of an extra night of guide, porter, food and camp logistics.

The trap. TNGR's public FAQ page still quotes IDR 150,000 per day for foreign climbers and still states a maximum of "3 hari 2 malam" — figures and rules from the pandemic era that the park's own later announcements have superseded. The FAQ is the page most people land on. The tariff announcement is the page that is current. If a fee you have been quoted traces back to IDR 150,000 per day, it is out of date. Check the tariff page, and re-check it before you travel, because these figures move.

The Rinjani 4D3N itinerary, day by day

This is the standard shape: Sembalun in, summit, lake, Senaru out. Times below are moving times for a reasonably fit group — add rest stops.

Day 1 — Sembalun trailhead to Plawangan Sembalun (approx. 6-8 hours)

You start in the Sembalun valley on the dry, eastern side of the mountain: open savannah, almost no shade, a long gentle traverse that lulls people into going out too fast. The day ends at Plawangan Sembalun, approximately 2,639 m — the crater-rim camp, and the last camp before the summit. The final section into camp is the notorious "seven hills" ridge, and it arrives late in the day when your legs are already done.

What the extra day changes here: nothing. Day 1 of a 4D3N is day 1 of a 3D2N. The gain comes later.

Day 2 — Summit push to 3,726 m, then down to Segara Anak

A pre-dawn start for the summit of Rinjani at 3,726 m above sea level, the highest point in the park. The final ridge is loose volcanic scree — the traditional description is three steps up, two steps back, and it is accurate. Back at camp mid-morning, you break down, then drop off the rim to Danau Segara Anak at roughly 2,010 m, the crescent-shaped caldera lake.

On a 3D2N this is where the itinerary starts to hurt, because you sleep at the lake and then face one enormous final day. On a 4D3N, day 2 ends here and stays ended.

Day 3 — The hot springs day, then up to Plawangan Senaru

This is the day that only exists on the 4D3N, and it is the reason to book it.

Morning at the lake and the Aik Kalak hot springs — the mineral pools on the lake's edge that Sasak communities use for healing rituals, and that trekkers use for wrecked quadriceps. Fishing, swimming, a genuinely slow morning. Then, in the afternoon, the climb out of the caldera to Plawangan Senaru, the western crater-rim camp, for sunset over the lake with the summit behind it.

On a 3D2N, that hot-springs morning does not happen. You leave the lake early and climb straight through.

Day 4 — Senaru rim down to Senaru village (approx. 5-7 hours)

A long, knee-punishing descent through montane forest to Senaru village. The Senaru side is the wet, green side of the mountain: shade, roots, mud even in dry season. Indonesia's tourism board puts the Senaru village to Senaru crater rim leg at 8-10 hours going up; going down on tired legs, budget 5-7 and take trekking poles seriously.

3D2N vs 4D3N: what the fourth day actually buys

If you are still choosing between trek lengths, our breakdown of Rinjani 2D1N vs 3D2N covers the shorter end of the range, and Sembalun vs Senaru explains why almost every 4D3N runs Sembalun-in and Senaru-out rather than the reverse.

The risk almost nobody prices in: the lake link can close

Here is the thing that separates a 4D3N from every other Rinjani itinerary, and it is not in the brochures.

In July 2025, TNGR temporarily closed the trail section from Plawangan Sembalun down to Danau Segara Anak and simultaneously suspended new ticket bookings in the eRinjani app, citing improvements to nature-tourism services and sustainable management of the conservation area. The end date was left as "to be announced later." Trekkers who already held tickets were allowed to climb on their booked dates.

Read that against the four-day route above. The 4D3N is the only Rinjani itinerary that depends on both the summit ridge and the crater-rim-to-lake descent. A 2D1N summit trip out-and-back via Sembalun survives a lake-link closure. A crater-rim trip survives it. A 4D3N does not — it collapses into something else.

That is not a reason to avoid the trek. It is a reason to ask three questions before you commit:

1. Is the Plawangan Sembalun to Segara Anak section currently open? Ask for it by name. "Is Rinjani open?" is too coarse a question.
2. What is the fallback if it closes after I book? A good answer is a specific alternative itinerary, not a shrug.
3. What happens to the permit days I have already paid for? Park fees are paid to TNGR, not to your guiding company, and the answer depends on the park's policy at the time.

Dry-season fire risk is a live 2026 issue at your camp

On 10 August 2026 a surface fire broke out around Camp Site Plawangan 1 and 2 on the Sembalun route — the exact ground you sleep on at the end of day 1. TNGR reported roughly 1.6 hectares burned and the fire brought under control the same evening, at around 18:30 WITA, with guides and porters on the mountain joining the response.

Four days later, on 14 August 2026, the park issued a dry-season fire advisory for the climbing routes. The instructions are short, and worth knowing before someone in your group does something thoughtless at 2,600 m:

• Never discard cigarette butts on the trail; extinguish them completely.
• Do not burn rubbish. Everything comes down with you.
• Site cooking stoves on open ground, away from grass, scrub and dry vegetation — and confirm the flame is fully out before moving on.
• Store matches and flammable items securely.
• Leave no glass behind.
• Report any smoke or flame to rangers immediately, with a precise location.

If your guide moves the kitchen twenty metres onto bare ground and away from the dry savannah grass, that is why. In August and September, on the Sembalun side, that is not fussiness.

How fit do you need to be for a Rinjani 4D3N trek?

The Rinjani 4D3N is easier per day than the 3D2N and harder overall. The fourth day shortens every individual stage, but it adds a third night at altitude and a third consecutive day of walking.

Summit day is identical. What changes is that you spend three nights on the mountain instead of two — three nights of broken sleep at altitude, three nights of cold, and a third consecutive day of walking on legs that have already done a summit push. Trekkers who are strong but under-recovered often find day 3's climb out of the caldera to Plawangan Senaru the psychological low point of the whole trip, precisely because it comes after the reward.

Train for consecutive days, not for one big day. Back-to-back long walks across a weekend beat a single heroic session. Our Rinjani trek difficulty guide has the conditioning breakdown, and the Rinjani packing list covers what is genuinely worth carrying for a third night versus what your porters already have.

If reading all this tells you the summit is not the point for you, say so early — the Rinjani Crater Rim Trek reaches the viewpoint most people actually came for, without the scree.

When is Rinjani open, and how do you book the permit?

Mount Rinjani is open to trekkers roughly April to December and closed over the wet season, and every permit is booked through the park's official eRinjani system.

Season. Rinjani's climbing routes close every year at the start of the wet season and reopen for the dry season. For 2026, all routes were closed from 1 January to 31 March and the season reopened from 1 April. The park's stated reasoning is straightforward: heavy rain makes trails slick, thick fog and running water cover the track, and hypothermia and accident risk rise sharply — and the closure gives soil, vegetation and wildlife a recovery window. Expect the same annual rhythm, and confirm current season dates with the park before you book flights.

Permits. Booking is through the official eRinjani system. Your ticket appears in the eRinjani app and in the email inbox you registered with, and you present the QR code — from the app or printed — at the pos pendakian on the morning you start. Bring the passport you booked with.

What the park is building. After a fatal fall in June 2025, Indonesia's Minister of Forestry ordered TNGR to formalise safety procedures. Announced measures included guide certification against national standards (of 621 guides, 321 were certified at the time), rescue training for a cadre of instructors, experience screening at the entrance gate, red/yellow/green zone signage on dangerous sections, and an emergency post at Plawangan (2,639 m) stocked with ropes, pulleys, warming equipment and drones. For scale on why this matters: TNGR recorded 93,796 climbers in 2024.

Context. Rinjani National Park covers 41,330 hectares across West, Central and East Lombok, gazetted by Ministry of Forestry decree No. 280/Kpts.VI/1997 in May 1997. Segara Anak sits at roughly 2,010 m with a depth of about 230 m. You are not walking in a small place.

Should you book the 4D3N or the 3D2N?

Book it if any of these are true: this is your first trek above 3,000 m; you are over 45 and would rather arrive at the summit fresh than fast; the caldera lake is a genuine reason you are coming, not a photo stop; or you have one shot at this mountain and want a weather buffer inside the itinerary.

Book the Rinjani Trek 3D/2N instead if you are confident on consecutive long days, you are tight on calendar time in Lombok, and a twelve-hour final descent does not frighten you.

Either way, sequence it early in your Lombok time rather than late — see the rest of our Lombok tours for what pairs well with a body that has just walked off a volcano. Timing matters more than most people think; the best month to trek Rinjani breaks the season down month by month.