Train for the descent, not just the climb · 2026
Do you need to train for Rinjani? And what 3,726 m actually feels like.
Most people who book are fit enough. They're just unsure how hard it really is and whether the altitude will catch them out. Here's the honest answer to both, and how to pick the route that fits your fitness instead of fighting it.
How hard Rinjani actually is, compared to what
Honest framing first, so you can stop guessing and start judging it against something you've done.
Rinjani is harder than a day hike, and lower and shorter than Kilimanjaro. It's a real mountain, 3,726 m, but the trek is short: two to four days, not a week. If you've done long hilly walks back-to-back and carried a daypack while doing it, you already know roughly what most of the trek feels like.
The thing people get wrong is treating the whole trek as the hard part. It isn't. Almost all of the difficulty lives in one stretch, summit night, a steep slog of loose volcanic gravel in the cold and dark, where you take two steps up and slide one back. The walking before it is long but manageable. The descent after is long and hard on the knees, but it's downhill.
So the honest version is: most reasonably active people finish the trek. Fewer reach the actual summit, and that gap is about the scree and the cold, not your gym numbers.
It's not the mountain that's brutal. It's one cold hour of it.
Is Rinjani harder than Kilimanjaro?
They are hard in different places. Which one is harder depends on which kind of hard you personally struggle with.
Start with the two numbers you can check yourself. Rinjani's summit is 3,726 m. Kilimanjaro's is 5,895 m, roughly 2,200 m higher. Kilimanjaro is normally walked over five to nine days, and the extra days exist so your body has time to acclimatise. Rinjani is two to four days, and none of those days is an acclimatisation day.
On Kilimanjaro, altitude is the main enemy. At nearly 6,000 m it is the usual reason people turn back. At 3,726 m it is a much smaller factor: most people feel Rinjani's height as a headache and heavy legs, not as the thing that ends their trek.
On Rinjani, the difficulty is steepness and surface, squeezed into a short trip. Summit night is loose volcanic scree where you slide back for every couple of steps you take, in the cold and the dark. The descent that follows is long and punishing on the knees. Kilimanjaro's trails are, for most of their length, a gentler walk that simply goes on much longer and much higher.
So we are not going to tell you that one is flatly harder than the other, and you should be wary of any operator who does. If altitude is the thing that breaks you, Rinjani is the easier of the two. If your knees are what break you, or you have three days rather than a week, Rinjani can be the harder ask.
A training plan that actually works
You don't need a coach or a gym. You need legs that are used to long days and stairs. If you have four weeks, this is enough for a fit-but-not-athlete to arrive ready.
The single most useful thing on this list is the back-to-back days and the downhill practice. Rinjani's descents are what surprise people, not the climb. To confirm: Wil happy to endorse this specific plan
What altitude feels like at 3,726 m
High enough to feel, low enough that most people are fine. Here's the honest middle ground.
Rinjani's summit is high enough that you'll notice it. Most people feel shorter of breath and a little slower on the final push, and that's normal, not a warning sign. It's not high enough to be the serious altitude of the big Himalayan or Andean peaks, where things turn dangerous fast.
The thing that helps most is built into the longer routes: on the three-day trips you sleep at the crater rim first, around 2,600 m, before the pre-dawn summit push. That night lets your body adjust, which is part of why the 3D2N and 4D3N feel kinder than the one-night dash.
"Most people are fine. A few aren't, and we can't tell who in advance, so we watch everyone, and we go at the pace of the slowest person, not the fittest."
That's the whole approach. Altitude doesn't care how many marathons you've run; it hits people at random. The job of the guide is to spot it early and act on it, which is the next section.
Symptoms to ride out vs take seriously
Mild altitude effects are normal and pass. A few signs mean you turn around. And that decision is the guide's to make with you, not a thing to tough out.
This is just the altitude
- A mild headache that eases with water and rest
- Being more breathless than usual on the climb
- Feeling slower, needing more stops than you'd like
- A poor night's sleep at the rim
This means go down
- A persistent headache that water and rest won't shift
- Nausea or vomiting on top of the headache
- Balance off, unsteady on your feet, confusion
- It's getting worse as you go higher, not better
Your guide watches for this on every trek and will call it before you do. Going down is the cure, and it works fast. None of this is failing; it's the trek working the way it's supposed to.
Diamox: do you need it for Rinjani?
Plenty of people ask. Here's Pak Wil's honest position, and the line he won't cross.
"It's your call, with your doctor. I don't recommend it and I don't discourage it."
Rinjani sits at the height where some people choose to take altitude medication and plenty of others climb it with nothing. Both are common. What we won't do is play doctor: we can't tell you whether to take it, or at what dose. That's a conversation for you and a medical professional who knows your history.
What we can tell you is that the longer routes with a rim night give your body time to adjust, and that going at a sensible pace does more than any pill. If you want medication in your kit, sort it with your doctor before you fly.
Who shouldn't book a summit route
We'd rather you have a good trek than a miserable one. So here's who we'd gently steer away from the summit push.
If long downhills wreck your knees, if you've got a heart or lung condition that climbing aggravates, or if the idea of a freezing 2 a.m. scree slog sounds like the opposite of a good time, the summit push may not be your trek, and that's completely fine.
You can still stand on the crater rim, sleep above the clouds, and look down into the lake and the new volcano growing inside the old one, without the summit night at all. The Senaru crater-rim route is built exactly for that: the views and the camp, none of the pre-dawn suffering. Many people who book it are the happiest on the mountain.
Tell Pak Wil how often you actually move in a week, and he'll point you at the route that fits, including the one without a summit night, if that's the honest answer.
He answers his own WhatsApp, 07:00-21:00 WITA. No booking pressure, just a straight read on what suits you.
WhatsApp Pak WilPicking the right route for your fitness
Be honest about which line you're on. The mountain is more forgiving when the route fits the legs.
Not sure which line is you? That's exactly what to message Pak Wil. He's matched fitness to route for nine years and won't sell you a harder trek than you need.
Fitness & altitude, quickly
Do I really need to train for Rinjani?
How high is the summit, and will the altitude affect me?
Should I take Diamox?
What's the hardest part of the trek?
What if I'm worried I won't make the summit?
"I've watched marathon runners turn back and quiet office workers reach the top. Fitness helps, but it's the people who pace themselves and listen to their bodies who stand on the summit."
Pak Wil, Senaru
Last reviewed by Pak Wil: 2 June 2026