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Mahakam River
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River
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The Mahakam River is the most significant river in East Kalimantan on the island of Borneo, stretching approximately 980 kilometers in length. Originating in the island's highlands, it empties into the Makassar Strait through a vast delta. The river is globally recognized for its population of Irrawaddy dolphins, locally known as Pesut Mahakam, which inhabit the freshwater sections and are critically endangered. The Mahakam serves as a major transportation route for the region's coal and timber industries, linking the interior to port cities like Samarinda. Along its course, there are numerous lakes and wetlands that host an immense amount of biodiversity. Culturally, the river is home to various Dayak tribes and was the center of the historic Sultanate of Kutai.
- Location: Indonesia
- Top sights: Museum Perjuangan Sanga-Sanga · Tugu Pembantaian Sanga-Sanga · Tugu Soekarno
- Nearby: Balikpapan (56 km)
Best time to visit & climate
The most pleasant time to visit is Jul–Sep.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 26 | 26 | 26 | 26 |
| Rain mm | 224 | 189 | 238 | 247 | 238 | 208 | 177 | 127 | 151 | 171 | 227 | 254 |
📋 Practical info
Getting there
The primary gateway for exploring the Mahakam River is usually the city of Samarinda in East Kalimantan. From there, visitors typically hire public houseboats or private motorized canoes to travel upstream into the interior.
Best season
The relatively drier months between June and September are often best for river travel and offer higher chances of spotting wildlife. Extreme wet seasons can dramatically increase the water flow and make upriver navigation quite arduous.
Terrain & paths
The river cuts through vast expanses of dense tropical rainforest, scattered riverbank villages, and massive lakes in the middle section. The shorelines are predominantly muddy and surrounded by thick, often impenetrable jungle vegetation.
What to bring
Light, long-sleeved clothing is crucial to protect against both the intense equatorial sun and aggressive insects. Binoculars are essential for spotting monkeys and the rare freshwater dolphins, while a waterproof bag protects electronics.
Parking
Secure parking for vehicles is mostly restricted to the main transport hubs and ports in Samarinda before beginning a river journey. It is not advisable to drive personal vehicles deep into the upper river basin settlements.
Safety
Traveling on the river requires caution; only use licensed boat operators and always ensure life jackets are provided on board. Malaria and dengue are present in the region, so rigorous mosquito bite prevention is strongly advised.
Time needed
A proper exploration of the river and its interior lakes usually requires a multi-day houseboat trip lasting between three to five days. Shorter day trips are possible from Samarinda but offer limited exposure to the deep jungle.
Geography
Facts
- The total length of the river is approximately 980 kilometers.
- The river's drainage basin covers 77,100 square kilometers.
- The rare Pesut Mahakam (freshwater dolphin) is the official mascot of East Kalimantan.
- The city of Samarinda is located about 48 kilometers upstream from the mouth.
- The Mahakam Delta covers an area of approximately 1,800 square kilometers.
- More than 20 different Dayak ethnic groups live along the upper reaches of the river.
Explore nearby
Notable places around
Route planner — Car & Motorhome
Where do you start? We build the route here, with stops and country notes along the way.
Vehicle
Only stops with (optional):
© OpenStreetMap contributors · OpenRouteService
Sights in the town Mahakam River (8)
Sights nearby
Frequently asked questions
Are there dolphins there?
Yes, the rare Irrawaddy dolphins live in this river.
Where is the river?
In East Kalimantan on the island of Borneo.
Can you rent houseboats?
Yes, multi-day tours on wooden houseboats are common.
Can you see monkeys?
Proboscis monkeys are often seen in trees along the banks.
Economic role?
Major transport route for coal and timber.
Mahakam River: where is it located?
Mahakam River is located in Indonesia.
Mahakam River: what is there to see?
Highlights include Museum Perjuangan Sanga-Sanga, Tugu Pembantaian Sanga-Sanga, Tugu Soekarno.
Mahakam River: when is the best time to visit?
The most pleasant time to visit is Jul, Sep.
Mahakam River: why is it worth visiting?
The Mahakam River is the most significant river in East Kalimantan on the island of Borneo, stretching approximately 980 kilometers in length.
Explore with Plizio
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Nearby cities
Samarinda
Samarinda is the capital of East Kalimantan, located on the Mahakam River.
Balikpapan
Balikpapan is a seaport city in East Kalimantan, and a center for Indonesia's oil and gas industry.
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