- Elevation: 1,035 m (3,396 ft)
- Prominence: 1,035 m
- Ribu category: Kurang Tinggi
- Province: Kepulauan Riau (Riau Islands)
- Google Earth: kml
- Other names: none
Gunung Ranai is the highest peak of Natuna Besar island, a remote island in the South China Sea between Borneo and the mainland Malaysian peninsula. Ranai is simultaneously the most isolated Ribu on the list, but also the Ribu closest to an airport (although Cyclops near Sentani airport in Papua must be a very close second). So, whilst it looks isolated on a map (many might assume it to be part of Malaysia) there are actually daily flights to/from Batam therefore getting there is not so difficult. The airport and town are both named after the mountain itself.
Despite several reports of ‘expeditions’ to the mountain, the usual hike is very straightforward but only leads to Serendit, the third-highest and most south-eastern of the three peaks on the summit ridge. There are three peaks on the mountain, each with high cliffs – Serendit (968m), Erik Samali (999m) and finally Datuk Husin (1,035m) all of which are separated by several hundred metres of dense forest. From Serendit in the south-east to Datuk Husin in the north-west it is about 2 kilometres, but there is no trail at the moment.
The trail to Serendit is remarkably well-defined and popular with local schoolkids during the weekend. The starting point is at Ranai Darat, at the end of a road which leads up between boulders and odd military signs and reaches an elevation of around 131m. It takes just over one hour to walk there from the centre of Ranai town or about 5 minutes on a motorbike! Follow the sign for the ‘air terjun’ (waterfall) as it leads over a bridge and past a house with loads of upturned beer cans (including the delightful Tiger beer from Singapore) and to a second sign with Gunung Ranai also mentioned. Just beyond here you will be able to gaze down to the right and see the eastern coastline and the enormous new mosque complex started in 2007 and still unfinished. The path continues to rise gently.
After an official but uninformative forest sign (282m) the trail enters proper forest. Watch out for leeches – you will probably meet one or two. At an elevation of 292m the trail divides – left for the waterfall and right up the hillside to the summit ridge of Ranai itself. It’s a good idea to visit the waterfall on your return. The mountain trail gets progressively steeper but it is pretty straightforward for the most part.
Given its isolation, it is not surprising that there is some fascinating flora and fauna to be spotted on Natuna Besar. At an elevation of between 600 and 700 metres there is a large population of small, bright red terrestrial crabs. Richard Hartnoll, a crab expert based in the UK, says that it is ‘a species of Geosesarma, a genus of small crabs which lives in fresh water or on land. Unlike the larger and better known ‘land crabs’, such as the ones on Christmas Island, it does not have to return to the sea to breed. It has suppressed the larval stage, and the eggs develop direct to small crabs.’ On seeing photos of these crabs, Richard put me in touch with Singapore-based Peter Ng who confirms that the bright red Ranai crab ‘is a new species that has no name. Some 7-8 years ago, several of my museum folks with an Indonesian student then did a study of the islands land and freshwater crabs and we collected many samples. Including this new species.’ Fascinating stuff.
After the final steep section, during which you will need to use your hands, a small clearing (905m) on the mountain ridge is reached. It should have taken you no more than 3 hours to reach from the trailhead or 4 and a half from the centre of Ranai town. It’s a perfect place for a short rest and home to a large number of the pitcher plant species Nepenthes ampullaria which is ‘a fairly widespread species in the Malay peninsular and on Borneo, though it also grows on Sumatra, parts of Maluku and New Guinea’ according to Nepenthes expert Alastair Robinson. Make sure you take some photos – there are hundreds clustered together just a few metres to the north of the clearing. If you are exceptionally lucky you may meet a Kekah, an exceptionally endangered primate that is only to be found in the Natuna islands and which looks as if it is wearing glasses!
On the other side, to the south/south-east, in fine weather you will see some very imposing vertical slabs of granite. This is the third-highest peak of the mountain, known as Serendit/Srindit Peak. It is just a ten minute scramble around and through the rocks to get up there, but there are lots of huge gaps between rocks so the utmost care is needed here. Once you have weaved your way through the bottom of the rock-face (crawling required!), some sections of the trail are very steep and there is even a little roped section but most fit hikers should be able to get up onto the top of the rocks.
A large Indonesian flag is draped around a cluster of boulders and hiking clubs have left signs and/or written their names into the stone. The views from here are lovely – out to the small island of Senua and over the town itself. You may even see one or two hornbills flying over the forest below. It’s a vertical cliff-face that some rock climbers have climbed up/down (you can see the metal attachments in the rocks) in the past so take real care not to go too close to the edge. This is what the vast majority of hikers regard as being the top of Ranai, but it’s only about 948m elevation. Indeed, you surely will have noticed that this is not even the highest point of Serendit Peak. There are two large boulders to the north of the markers and one of those is the 968m point. And it’s not accessible for ordinary hikers.
After enjoying the view it is a straightforward 2-hour hike back down. The waterfall is worth a visit, especially as it is very quiet and only a ten-minute detour. With regard to the two higher peaks of the mountain, we heard reports that there may be a second trail (though presumably rather rough) from the northern end at Desa Ceruk near Desa Lima Manis. However, we also heard that there are landslides in this area which may have made any trail impassable. There is no guarantee of a trail to the true peak (northwestern top) (1,035m) but it may be worth a try if you have extra time to explore. You are advised to ask for ‘Gunung Ceruk’.
A great place to sit and gaze at the mountain is Alif Stone Park, about 7km north of Ranai town. It’s a collection of beautiful, natural granite boulders on the beach, with basic wooden planks connecting them to the shore. The boulders are of the same sort as those found on Bangka and Belitung and the location is well worth visiting at dusk for photographs.
Bagging information by Dan Quinn (September 2013)
For a high quality PDF version of this and other trail maps, please download from our Trail Maps page.
- Getting there: There are flights from Batam twice a day (except Sundays). The mountain is less than 5km from the airport.
- Guides and GPS Tracks: Want a PDF version for your phone? Looking for a guide? Need GPS tracks and waypoints? Gunung Ranai information pack can be downloaded here.
- Trip planning assistance: Would you like Gunung Bagging to personally help you in arranging your whole trip? Please contact us here.
- Permits: Not necessary. Foreigners should expect to have to show their passport/ID cards on arrival at the airport.
- Water sources: Available at the waterfall (334m) and at ‘Air Dingin’ (769m).
Local Average Monthly Rainfall (mm):