Mount Kinabalu rises out of the rainforest of Sabah, in the Malaysian part of Borneo, to 4,095 m. It is the highest mountain in Malaysia and one of the highest in Southeast Asia, and it does something few mountains of its size do: it can be climbed in two days, on a maintained trail, from a road that is only two hours from an international airport. That accessibility has made it one of the most climbed high mountains in Asia. It has also given rise to a strict system of quotas and mandatory guides, and, on the granite slabs near the summit, a via ferrata that holds the record as the highest in the world.
We climbed Kinabalu in March, the driest part of the year, and added the via ferrata on the descent. Here is what the mountain asks of a trekker and what it gives back.
A mountain of granite in a park of rainforest
Kinabalu is a granite pluton, a mass of rock that rose through the surrounding sediments around 10 million years ago and is still rising, by a few millimetres a year. The summit plateau is bare rock, scoured by ice during the last glaciation and now cut by deep gullies. Around it, Kinabalu Park protects 754 square kilometres of forest that runs from lowland dipterocarp jungle to cloud forest and alpine scrub. The park was Malaysia’s first UNESCO World Heritage site, listed in 2000 for a biodiversity that includes more than 5,000 plant species, giant pitcher plants, hundreds of orchids and a red-and-black leech that preys on giant earthworms.
The mountain’s height was revised in 2016, after a satellite survey, from 4,101 m to 4,095 m. The highest point is known as Low’s Peak, after the British colonial officer who made the first recorded attempt in 1851. He did not reach the top; that came in 1888. To the Kadazan-Dusun people of the surrounding hills, the mountain is a resting place of the spirits of the dead, and guides still observe rituals of respect on the summit.
The standard two-day climb
Almost everyone climbs the same way. Day one starts at the Timpohon gate at 1,866 m, a short drive from the park headquarters, and follows a steep, stepped trail 6 km through the forest to the overnight base at about 3,270 m. The trail gains roughly 1,400 m in that distance, with shelters every kilometre or so, and most parties take four to six hours. The forest changes visibly as you climb: tall trees and ferns give way to mossy oaks and rhododendrons, then to stunted conifers and, near the base, to open rock with tufts of grass.
Day two begins at about 2:30 in the morning. From the base it is 2.7 km and 800 m of ascent to the summit, first on wooden steps, then across granite slabs where thick ropes are fixed to the rock as handrails. A checkpoint at 3,668 m, where guides confirm every climber’s permit, marks the point beyond which the mountain is all stone. The last kilometre is a walk up a broad slab to the summit block, with a short scramble to the top. Climbers arrive around dawn, and on a clear morning the view stretches over the whole of northern Borneo to the sea. The descent, all the way back to Timpohon, takes the rest of the day and is harder on the knees than the ascent.
The via ferrata on the summit plateau
The granite above the base is ideal ground for a protected climbing route, and since 2007 a via ferrata has been fixed across the eastern face of the plateau. There are two options. The shorter route takes two to three hours and involves a traverse of slabs and short vertical steps on iron rungs and cables, suitable for anyone comfortable with heights. The longer circuit begins at 3,776 m, just below the summit, and descends the face for four to five hours over about 1.2 km of cable, ladders, a suspension bridge and long stretches of exposed slab. It is this longer route that is recognised as the highest via ferrata in the world.
Both routes are done on the morning of the summit day, after reaching the top, and both require a harness, helmet and lanyards that are provided along with a mountain guide. No previous climbing experience is needed, but the exposure is real and the combination of altitude, a 2:30 start and several hours on the rock is tiring. Minimum age and weight rules apply, and the routes close in bad weather. Climbers who intend to do the via ferrata should book it with the climb permit, as the places are limited.
Permits, quotas and guides
Kinabalu cannot be climbed independently. The park limits the number of climbers each day to the number of beds available at the base, and permits are tied to those beds. Every party must be accompanied by a licensed mountain guide from the local community, and day climbs are not allowed. In practice this means that a climb is booked months ahead, that the overnight accommodation, the permit, the guide and insurance are arranged together, and that turning up at the gate without a reservation means going home. The system was tightened after 2015, when an earthquake of magnitude 6.0 struck the mountain, killing 18 people and destroying part of the trail. A new section was opened later that year, and the current route is the result.
Weather, altitude and timing
Kinabalu sits six degrees north of the equator, and its weather follows a daily rather than a seasonal pattern. Mornings are usually clear, cloud builds from late morning, and rain falls most afternoons. This is why the summit push starts in the dark. The driest months are from February to April; the wettest are from October to January, when the north-east monsoon brings persistent rain and the summit is often closed. Temperatures at the top hover around freezing before dawn, and wind chill on the slabs is significant. A warm hat, gloves and a waterproof shell are needed even though the trailhead is tropical.
The altitude is the most underestimated part of the climb. Going from sea level to 3,270 m in a single day and to 4,095 m the next morning is fast, and mild altitude sickness is common at the base overnight. The best preparation is a night at park headquarters, at about 1,560 m, before starting. Anyone with a serious headache or vomiting at the base should not attempt the summit, and guides will make that decision if the climber does not.
A summit worth the rules
Kinabalu is a controlled experience, and it will not suit those who want to walk into the mountains alone. But the rules exist because the mountain is fragile, the community depends on it and the slabs are dangerous in the wet. Within those limits, it delivers something rare: a 4,000 m summit, sunrise over rainforest and sea, and a morning on granite that few people forget.