Kayan Mentarang National Park

Kayan Mentarang National Park (Taman Nasional Kayan Mentarang) is a massive protected area spanning approximately 13,605 km² in the northeastern corner of North Kalimantan, bordering Malaysia's Sarawak. It is the largest national park in Kalimantan and one of the largest in Indonesia, encompassing the remote and rugged terrain of the Kayan and Mentarang river basins. The park is part of the "Heart of Borneo" initiative, a transboundary conservation area shared with Malaysia and Brunei.

Established in 1996, the park protects vast tracts of primary lowland and montane rainforest that are home to an extraordinary diversity of flora and fauna, including clouded leopards, sun bears, hornbills, and the rare Bornean pygmy elephant. The park also shelters numerous Dayak indigenous communities — including the Kenyah, Kayan, and Lun Bawang peoples — who maintain traditional lifestyles, longhouses, and rice terrace cultivation.

The climate is tropical with heavy rainfall year-round, averaging 3,000–5,000 mm annually. The wet season runs October–April. Temperatures range from 20°C in the highlands to 32°C in the lowlands. The park is extremely remote — access requires multi-day river journeys and trekking, and independent travel is not permitted without a guide and permits.

By Plane

The nearest airport is Juwata International Airport (TRK) in Tarakan, with flights from Balikpapan, Jakarta, and Surabaya. From Tarakan, it is a full-day journey by speedboat and road to access the park. Alternatively, Datah Dawai Airport in Malinau serves small aircraft from Tarakan but flights are infrequent.

By Car / Road

No roads lead directly to the park. The typical route involves a speedboat from Tarakan to Malinau (3–4 hours), then a combination of road and river transport deeper into the interior. All arrangements must be made through a licensed tour operator in Tarakan or Malinau.

Longboats (ces) are the primary mode of transport along the Kayan, Mentarang, and Bahau rivers. Trails between longhouses and through the forest are navigable on foot with a Dayak guide. There are no motorable roads inside the park. All river transport and guiding must be arranged in advance.

• Primary Rainforest: Vast, undisturbed dipterocarp forest with towering canopy trees, rattan, and wild orchids — some of the oldest rainforest on Earth.

• Dayak Longhouses: Traditional communal dwellings of the Kenyah and Kayan peoples, often decorated with murals and carvings. Many longhouses welcome respectful visitors.

• Rice Terraces: The Dayak highland communities cultivate scenic rice terraces carved into the mountainsides around the park's periphery.

• Wildlife: Clouded leopards, sun bears, sambar deer, bearded pigs, and multiple primate species. Birdlife includes rhinoceros hornbills, bulwer's pheasants, and Bornean bristleheads.

• Mount Mentarang: The park's highest peak, a challenging multi-day trek for experienced wilderness hikers.

• Multi-Day Expeditions: Extended trekking and river journeys of 7–14 days through the park's interior — the quintessential Borneo wilderness experience.

• Cultural Homestays: Stay in a Dayak longhouse community and learn about blowpipe hunting, traditional weaving (tenun), and forest medicine.

• River Safaris: Longboat trips along the Kayan and Mentarang rivers for wildlife spotting and scenic canyon cruising.

• Birdwatching: Over 300 bird species including all eight Bornean hornbill species — among the best birding in Southeast Asia.

• Photography: The combination of pristine wilderness, traditional cultures, and dramatic river scenery is a photographer's dream.

Meals are provided by the tour operator or host family — typically rice with fish or chicken, vegetables, and sambal. Dayak cuisine features bamboo-cooked rice (nasi bambu), wild jungle ferns, and freshwater fish from the rivers. Bring high-energy snacks and instant noodles as backup. There are no restaurants or warung in the park.

All drinking water must be brought or purified on site using tablets or filters. The river water requires treatment. Sweet tea and coffee are served at longhouse stays. Avoid untreated water. Alcohol is not widely available — bring your own if desired.

• Budget: Basic guesthouses in Malinau and Tarakan (Rp 150,000–300,000/night).
• Mid-range: Longhouse accommodation with Dayak communities — very basic (sleeping on mats in the communal area), typically included in tour packages at Rp 400,000–700,000/person/night including meals.
• Camping: Multi-day expeditions involve tent camping at designated riverside camps. All gear is supplied by the tour operator.

There are no shops within the park. Stock up on all supplies in Tarakan or Malinau before departing. Local Dayak handicrafts — such as bead necklaces, woven mats, and carved wooden items — can be purchased directly from longhouse communities. Bargaining is not customary in traditional contexts; a fair price is offered by the artisan.

• Malinau: Gateway town with the park headquarters and last amenities, 3–4 hours by speedboat upriver from Tarakan.
• Tarakan: Island city with the nearest airport, hotels, and supply shops — the starting point for all park trips.
• Sebatik Island: A border island shared with Malaysia, reachable from Tarakan — known for beaches and cross-border market.
• Taman Nasional Kayan Mentarang extension: The proposed expansion area connecting to Sarawak's Pulong Tau National Park.