What is Borneo, and why is it split between three countries?
At roughly 748,168 km², Borneo is the third-largest island on Earth, after Greenland and New Guinea, and is politically divided among three states: Indonesia with about 73% of its area as Kalimantan, Malaysia with about 26% in the states of Sabah and Sarawak, and the small sultanate of Brunei with about 1% on the northwest coast.
This page treats Borneo as a connected natural region: rainforest, river systems, orangutans, and Mount Kinabalu as the island's highest point. Practical travel details for Sabah and Sarawak appear in full on the Sabah and Sarawak pages; for Kalimantan and Brunei, the general Indonesia and Brunei pages apply.
Anyone wanting to combine the whole island in one trip needs considerably more time than for a single region, because of the three separate entry regimes and the large distances involved; most travelers focus on Sabah and Sarawak, or add a side trip to Kalimantan.
Sources: Seasia.co
How is Borneo structured as a natural landscape?
A central mountain range runs across the island from northeast to southwest, with the 4,095 m Mount Kinabalu in Sabah as its highest point. From there, major river systems fan out toward the coasts: the Kapuas in West Kalimantan runs over 1,143 km, the Kinabatangan in Sabah over 560 km, and the Rajang in Sarawak is Malaysia's longest river.
Borneo lies almost entirely in the tropical lowlands, under a continuous rainforest canopy that, just a few decades ago, still covered nearly the whole island. Today an estimated half of the original forest has been cleared, with marked differences between regions: Sabah has lost about 40% of its forest cover since 1973, Kalimantan about 31%, Sarawak about 23%, and Brunei about 8%.
Over 400 distinct Dayak groups live across the island, totaling around 4.21 million people: in Kalimantan they are usually referred to collectively as Dayak, in Sarawak they're named by group, such as Iban, Bidayuh or Orang Ulu, while in Sabah the Kadazan-Dusun, Bajau and Murut dominate.
Which countries does Borneo belong to, and what does that mean for a trip?
Borneo isn't a country of its own — it's split across three sovereign nations, each with its own entry rules: Malaysia (Sabah, Sarawak), Indonesia (Kalimantan), and Brunei. Traveling between regions means crossing real national borders with their own passport and customs checks, even though the island is geographically continuous.
| Region | Country | Entry | Details |
|---|---|---|---|
| Sabah, Sarawak | Malaysia | visa-free up to 90 days, MDAC mandatory | separate entry stamp required per state |
| Kalimantan | Indonesia | e-VOA/Visa on Arrival, 30 days, extendable once | 500,000 IDR, online or at the airport |
| Brunei section | Brunei | visa-free up to 90 days | E-Arrival Card and BruHealth health declaration mandatory |
Sabah and Sarawak also control immigration separately from Peninsular Malaysia and from each other; anyone flying from Kuala Lumpur to Kota Kinabalu or Kuching goes through a separate passport check despite it being a domestic flight. Full details are on the Malaysia, Indonesia and Brunei pages.
Sources: Federal Ministry for European and International Affairs BMEIA · Jabatan Imigresen Malaysia
Which natural areas and places define Borneo?
The Malaysian side offers Mount Kinabalu, the island's highest point, and Gunung Mulu, home to the largest known cave systems on Earth — both UNESCO World Heritage sites. Indonesian Kalimantan offers Tanjung Puting National Park, one of the best-known orangutan destinations in the world, along the Sekonyer River.
Sabah and Sarawak (Malaysia)
Mount Kinabalu rises 4,095 m above the national park of the same name, a UNESCO World Heritage site since 2000 for its exceptional biodiversity; further east, Sepilok and the Kinabatangan River are two of the most accessible places to see wild orangutans and proboscis monkeys. In Sarawak, Gunung Mulu National Park's Sarawak Chamber is the largest known cave chamber on Earth. Details on both states are on the dedicated Sabah and Sarawak pages.
Kalimantan (Indonesia)
Tanjung Puting National Park in Central Kalimantan, reached via the port town of Kumai near Pangkalan Bun, is considered one of the most reliable places in the world to see wild orangutans: multi-day trips on a klotok, a covered wooden boat, travel up the Sekonyer River, passing feeding stations where formerly released animals often turn up.
Pontianak and the Kapuas
Pontianak, the capital of West Kalimantan, sits directly on the equator; the Equator Monument (Tugu Khatulistiwa), first built in 1928, marks the boundary between the northern and southern hemispheres. From here the 1,143 km Kapuas, Indonesia's longest river, flows into the South China Sea and serves as the main transport route for the whole of western Kalimantan.
Brunei
Brunei's small share of the northwest coast is heavily forested and less developed for tourism than the neighboring regions; details on the country and its capital, Bandar Seri Begawan, are on the dedicated Brunei page.
Between the four regions lie large, barely developed forest areas with no continuous road links; the so-called "Heart of Borneo," a cross-border conservation initiative between Malaysia, Indonesia and Brunei, covers wide stretches of the central highlands and aims to hold together the remaining rainforest corridors between the regions over the long term.
Sources: UNESCO World Heritage Centre · Wikipedia · The World Travel Guy · Wikipedia
When is the best time to visit Borneo?
Borneo sits right on the equator and has a humid, warm tropical climate year-round with no pronounced seasons, with temperatures usually between about 23 and 32 °C. The northeast monsoon brings more rain to the northern and eastern coasts from November to February, while June to September is generally regarded as comparatively dry.
Detailed monthly figures for Kota Kinabalu and Kuching, with their own climate tables, are on the Sabah and Sarawak pages; a similar pattern applies in Kalimantan, with rainfall tending to be somewhat more evenly spread across the year, since that part of the island sits more directly on the equator and is less affected by seasonal monsoon winds.
For boat trips such as Tanjung Puting or the Pinnacles trek in Gunung Mulu, the drier period from June to September is more favorable, since river levels are lower and trails less slippery. For the Mount Kinabalu climb specifically: on clear days between February and April, the chances of a cloud-free sunrise at the summit are highest.
Anyone combining several regions, say Sabah with Kalimantan, is best off planning the trip within this shared dry period, though local weather can still vary by coast and elevation.
Sources: Wikipedia
What do I need to enter Borneo?
There's no single Borneo visa: travelers visiting only Sabah and Sarawak need the Malaysian MDAC plus a separate entry stamp for each state; those heading to Kalimantan need the Indonesian e-VOA for 30 days; and for the Brunei section, visa-free entry with an E-Arrival Card applies (as of September 2026).
Travelers combining several regions, say Kota Kinabalu followed by Kalimantan, go through a full new entry process with the relevant forms at every border crossing, not just a passport check. Detailed, country-specific rules including passport validity and customs are on the Malaysia, Indonesia and Brunei pages.
The relevant national authorities always have the final say; the FDFA, the German Federal Foreign Office and BMEIA summarize their rules, which can change at short notice (as of September 23, 2026).
Sources: Federal Ministry for European and International Affairs BMEIA · Jabatan Imigresen Malaysia
What health advice applies to Borneo?
In the Malaysian part, healthytravel.ch classifies Sabah and Sarawak as areas of moderate malaria risk, while the CDC sees the risk mainly in the dense jungle interior; since 2018 Malaysia has seen practically only the monkey-transmitted form, Plasmodium knowlesi. For Kalimantan and Brunei, the general health rules for Indonesia and Brunei apply.
Anyone planning multi-day jungle or river trips, say to Danum Valley, Gunung Mulu or Tanjung Puting, should discuss malaria prophylaxis with a travel medicine provider before departure; for short city and coastal stays, consistent mosquito protection is usually enough. Detailed, country-specific vaccination recommendations are on the Malaysia and Indonesia pages.
Sources: healthytravel.ch (Swiss Society of Tropical Medicine and Travel Medicine) · CDC Travelers' Health
How safe is Borneo for travelers?
Borneo's major natural destinations, from Mount Kinabalu to Gunung Mulu to Tanjung Puting, are considered fundamentally safe by the FDFA, the German Federal Foreign Office and BMEIA. There is an explicit advisory against travel to Sabah's east coast between Lahad Datu and the Philippine border because of the risk of kidnapping by armed groups (as of September 23, 2026).
This warning applies only to the so-called Eastern Sabah Safety Zone, explained in detail on the Sabah page; no comparable warnings exist for Sarawak, Kalimantan or the Brunei section, where the usual general precautions apply.
Sources: German Federal Foreign Office · Federal Department of Foreign Affairs FDFA · Federal Ministry for European and International Affairs BMEIA
How do you get to Borneo?
There's no central Borneo airport: Kota Kinabalu (BKI) and Kuching (KCH) serve the Malaysian part, Pontianak (PNK) and Balikpapan (BPN) the Indonesian part, and Bandar Seri Begawan (BWN) the Brunei section. From Europe, you always travel via a hub such as Kuala Lumpur, Singapore, Jakarta or Hong Kong.
| Airport | IATA | Region | Main connecting hubs |
|---|---|---|---|
| Kota Kinabalu | BKI | Sabah, Malaysia | Kuala Lumpur, Singapore, Hong Kong |
| Kuching | KCH | Sarawak, Malaysia | Kuala Lumpur, Singapore |
| Pontianak | PNK | West Kalimantan, Indonesia | Jakarta |
| Balikpapan | BPN | East Kalimantan, Indonesia | Jakarta, Surabaya |
| Bandar Seri Begawan | BWN | Brunei | Singapore, Kuala Lumpur, Kuching |
There are hardly any continuous roads between the island's regions; anyone wanting to travel from Kota Kinabalu to Pontianak, for example, will almost always fly via Kuala Lumpur, Singapore or Jakarta rather than travel overland. Between Kuching and Pontianak, however, there is a direct bus connection via the Tebedu–Entikong border crossing.
Nonstop flights between Kota Kinabalu and Kuching run several times a day and take around 1 h 25 min; Royal Brunei Airlines flies to Brunei from both Kota Kinabalu and Kuching.
Sources: AeroCorner · AeroCorner
What should you know about money and costs on Borneo?
Each region has its own currency: ringgit (MYR) in Sabah and Sarawak, rupiah (IDR) in Kalimantan, and Brunei dollar (BND) in Brunei, which is effectively at par with the Singapore dollar. Traveling across regions therefore means changing money or withdrawing cash in multiple currencies.
In Kota Kinabalu and Kuching, cards are widely accepted; in Kalimantan outside larger cities like Pontianak or Balikpapan, and on boat trips such as Tanjung Puting, cash is usually needed. Guided nature tours with boat transport and permits are the biggest expense item on a Borneo trip in all three regions, considerably pricier than pure city stays.
Exchange rates between ringgit and rupiah differ hugely in scale; travelers combining both regions find it simplest to rely mainly on cards and exchange only small amounts of cash locally.
Sources: Seasia.co
Where do you stay on Borneo?
In the cities of Kota Kinabalu, Kuching, Pontianak and Bandar Seri Begawan, choices range from hostels to international hotel chains. Away from the cities, lodges, boats and homestays are often the only option: the Borneo Rainforest Lodge in Danum Valley, klotok houseboats in Tanjung Puting, or Iban longhouses in Batang Ai.
Nature-focused stays in all three regions are usually part of a multi-day package including guide, meals and transport, since independent travel to these places often isn't practical. Anyone moving between several regions books the relevant lodges separately, as there are no cross-region tour operators offering a single booking.
What do you eat on Borneo?
Cuisine differs by region but shares common core ingredients: rice, fish and jungle vegetables. In Sabah and Sarawak, Kadazan-Dusun and Iban dishes such as hinava or bamboo-cooked rice (pansoh) shape local cooking, while Kalimantan's cuisine leans on Indonesian-Malay influences with plenty of coconut milk and sambal.
Wild fruits like durian and rambutan grow across the whole island and are sold seasonally at markets from Kota Kinabalu to Pontianak. Details on the cuisines of each region are on the Sabah and Sarawak pages as well as the Indonesia page.
What culture shapes Borneo?
Over 400 Dayak groups, totaling around 4.21 million people, live spread across the whole island; they're named differently depending on the region, yet share related traditions such as the longhouse as a way of living and harvest festivals after the rice harvest.
In Sarawak, the Iban and other Dayak groups celebrate the Gawai festival in early June; in Sabah, the Kadazan-Dusun celebrate Kaamatan in May. Both festivals mark the end of the rice harvest with music, rice wine and traditional dress. In Kalimantan, Dayak communities keep similar ceremonies, often less developed for tourism than in Malaysia.
Headhunting was part of the war and status culture of several Dayak groups until well into the 20th century; today this history lives on mainly in museums and the stories of older generations, not in living practice.
Sources: Wikipedia
What are the best experiences on Borneo?
Among the most memorable experiences on the island are a klotok trip to wild orangutans in Tanjung Puting, sunrise from the summit of Mount Kinabalu, the evening bat exodus from Deer Cave in Gunung Mulu, and a night in a Dayak longhouse.
- Tanjung Puting (Kalimantan): book a multi-day klotok tour from Kumai, visit feeding stations with released orangutans.
- Mount Kinabalu summit (Sabah): secure a 2D1N permit months in advance, see the Sabah page.
- Gunung Mulu (Sarawak): watch the bat exodus from Deer Cave, tackle the Pinnacles trek if you're an experienced hiker.
- Kinabatangan river safari (Sabah): combine a night, morning and evening cruise for the best chance of wildlife sightings.
- Iban longhouse (Sarawak): book a homestay in Batang Ai, and respect the welcome ritual led by the Tuai Rumah.
Travelers with time for only one region will find the widest range of experiences within short distances in Sabah; those seeking true remoteness will find Kalimantan offers less infrastructure but equally reliable orangutan sightings.
Sources: The World Travel Guy · UNESCO World Heritage Centre · Wikipedia
How do you travel responsibly on Borneo?
Since 1973, an estimated half of Borneo's original rainforest has disappeared, mainly due to logging and palm oil plantations; the remaining protected areas such as Kinabalu Park, Gunung Mulu and Tanjung Puting are vital to the survival of orangutans and other endangered species.
Booking certified guides and licensed national park tours instead of informal operators directly supports the upkeep of these areas and automatically ensures permit rules are followed. For orangutan viewing, whether in Sepilok, Semenggoh or Tanjung Puting, the same principle applies everywhere: keep a safe distance, don't feed the animals, and follow ranger instructions to avoid transmitting disease to them.
Sources: Mongabay
What can you combine a Borneo trip with?
A natural combination is Sabah and Sarawak as a two- to three-week round trip, extended with a side trip to Brunei via Kota Kinabalu or Kuching. Anyone wanting to experience the Indonesian side usually combines Kalimantan with a separate trip out of Jakarta, since direct connections to the Malaysian side are rare.
Travelers with plenty of time also combine Sabah or Sarawak with other destinations in Malaysia such as Kuala Lumpur or Penang, usually flying via the capital.
Who is Borneo a good fit for, and who should look elsewhere?
Borneo suits travelers who want to experience rainforest, wildlife watching and indigenous culture across national borders, and who are willing to accept simpler lodges, boats, and multiple entry procedures along the way. It's less suited to anyone looking for a short, uncomplicated trip without border crossings.
For a first trip to Borneo, a single region is usually enough, most often Sabah for its good infrastructure and short distances. Travelers who already have Southeast Asia experience and want remoteness will find Kalimantan less developed for tourism, with similarly good chances of seeing orangutans.