Lake Sentarum National Park

Lake Sentarum National Park (Taman Nasional Danau Sentarum) is a 1,320 km² protected wetland in West Kalimantan's Kapuas Hulu regency, near the border with Sarawak. The park protects a unique system of seasonal floodplain lakes, peat swamp forests, and freshwater swamp forests that pulse with the annual rhythms of the Kapuas River. During the wet season (November–May), the lakes expand dramatically to cover up to 80% of the park, creating a vast inland sea dotted with tree islands and floating villages.

Designated as a national park in 1999, Lake Sentarum was earlier recognised as a Ramsar Wetland of International Importance in 1994. It is one of the most biodiverse freshwater ecosystems in Southeast Asia, harbouring over 200 fish species, proboscis monkeys, orangutans, false gharials (tropical freshwater crocodiles), and an extraordinary abundance of birdlife. Local communities — predominantly Malay fishermen and Dayak farmers — live on the lake in stilted villages and floating houses.

The climate is equatorial, with heavy rainfall from November to May and a drier season from June to October. The best time to visit is during the dry season when water levels are moderate — wildlife concentrates around shrinking water bodies and boat access is easier. During the peak wet season, large areas become impassable lagoon.

By Plane

The nearest airport is Pangsuma Airport (PSU) in Putussibau, served by Wings Air flights from Pontianak. From Putussibau, the park is reachable by 4–6 hours by longboat via the Kapuas and Tawang rivers. Alternatively, Supadio International Airport (PNK) in Pontianak requires onward river travel of 2–3 days.

By Car / Road

Road access is limited. A 4WD from Pontianak to Putussibau takes 12–14 hours (paved to Sintang, then rough road). From Putussibau, all onward travel to the park is by boat. Most visitors arrange a full package with a tour operator in Pontianak or Putussibau.

The only way to explore Lake Sentarum is by motorised longboat. The lake and its surrounding channels form a labyrinth of waterways connecting villages, forest patches, and fishing grounds. Boats can be hired in Putussibau or at the park's Lanjak entrance point. Local fishermen also offer informal tours.

• Seasonal Lake System: The park's defining feature — a vast floodplain that transforms between a shallow lake and a network of rivers and pools depending on the season.

• Proboscis Monkeys: Large troops gather along the waterways, especially in the morning and late afternoon.

• False Gharials: The park is one of the best places in Borneo to spot these rare, slender-snouted crocodiles.

• Orangutans: Smaller populations inhabit the swamp forest around the lakes.

• Floating Villages: Stilt communities of the Melayu fishermen — a fascinating glimpse into a waterborne way of life.

• Birdlife: Over 200 species including storm's storks, lesser adjutants, herons, egrets, and kingfishers.

• Houseboat Trips: Multi-day journeys on a houseboat through the lake system — the classic Lake Sentarum experience.

• Fishing Excursions: Join local fishermen casting nets and lines in the traditional style. The lake is famous for its freshwater fishery.

• Wildlife Photography: The park offers exceptional opportunities to photograph proboscis monkeys, crocodiles, and waterbirds from close range on the water.

• Village Visits: Stop at floating and stilted villages to observe daily life, buy dried fish, and try local food.

• Birdwatching: Sunrise and sunset boat trips yield the best sightings — bring binoculars.

Lake Sentarum is famous for its freshwater fish — ikan patin (catfish), ikan baung (a local river catfish), and ikan betok (climbing perch) are staples. Most meals consist of grilled or fried fish with rice and sambal. Tour operators provide meals on houseboat trips. Village homestays offer home-cooked dishes. Bring snacks from Putussibau.

Bottled water is essential — the lake and river water require treatment. Sweet tea is served everywhere. The region is predominantly Muslim, so alcohol is not available locally.

• Budget: Very basic homestays in floating villages (Rp 100,000–200,000/night) — sleeping on mats in a stilt house, no running water.
• Mid-range: Houseboat accommodation included in tour packages (Rp 400,000–700,000/person/night including meals and guiding).
• Camping: Possible on small islands or raised platforms during the dry season with prior arrangement from the park office.

The villages around the lake produce limited handicrafts and notably high-quality dried fish and shrimp. Lanjak and Putussibau markets sell freshwater fish products, woven goods, and basic supplies. Bargaining is standard in markets.

• Putussibau: Gateway town with the park office, airport, and supplies.
• Betung Kerihun National Park: Adjacent to the north, accessible by river — a vast rainforest reserve with Dayak communities and orangutans.
• Lanjak: A village on the park's edge with an entry point and basic services.
• Pontianak: West Kalimantan's capital, 700 km downstream via multi-day river journey.