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Iténez River

Plizio editorial teamUpdated: Jun 2026Data Sources

River

Weather…

The Iténez River, also known as the Guaporé in Brazil, is a major waterway in eastern Bolivia, forming a natural border between Bolivia and Brazil for approximately 850 kilometers. It originates in the Mato Grosso state of Brazil and flows northwest until its confluence with the Mamoré River. The river is notable for its clear 'blackwater' characteristics, which stand in stark contrast to the sediment-rich 'whitewater' rivers common in the Amazon basin. Along its banks are extensive floodplains and gallery forests that provide a sanctuary for diverse wildlife, including caimans, river dolphins, and a vast array of fish species. In Bolivia, the Iténez flows past the Noel Kempff Mercado National Park, a UNESCO World Heritage site renowned for its ecological integrity. Historically, the river was a strategic frontier between the Spanish and Portuguese empires, as evidenced by the massive ruins of the Príncipe da Beira fortress on the Brazilian side, one of the largest colonial structures in South America.

Best time to visit & climate

The most pleasant time to visit is May–Jul.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg °C	26	26	26	26	25	26	27	29	30	29	28	26
Rain mm	215	222	175	105	56	23	20	24	61	120	136	247

📋 Practical info

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Getting there

Access to this remote river usually involves organizing boat transport from regional frontier towns in Bolivia or Brazil, as it forms the extensive natural border between the two countries.

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Best season

The dry season, typically running from June to November, is widely considered the best time to visit, as lower water levels make navigation easier and concentrate wildlife along the banks.

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Terrain & paths

The immediate environment consists of dense riparian vegetation, muddy riverbanks, and tropical lowland forests, which can become heavily flooded and difficult to traverse during the rainy months.

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What to bring

Visitors should pack strong insect repellent, lightweight long-sleeved clothing to protect against mosquito bites, a rain poncho, and binoculars for spotting wildlife along the riverbanks.

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Parking

Vehicles are usually left in the larger gateway settlements or border towns on either the Bolivian or Brazilian side, as travel along the river corridor itself is exclusively by boat.

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Safety

Travel in this remote border region requires caution regarding tropical diseases; standard precautions against mosquitoes are necessary, along with hiring experienced local boat guides for navigation.

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Time needed

Exploring this vast waterway typically requires a multi-day boat expedition, though shorter half-day or full-day excursions can sometimes be arranged from the main riverside settlements.

Geography

Coordinates

-11.85000, -64.63300

Facts

Forms the border between Bolivia and Brazil for 850 kilometers.
Originates in the Mato Grosso state of Brazil.
Emptying into the Mamoré River after its long course.
Flows alongside the Noel Kempff Mercado National Park (UNESCO).
Characterized by clear water with low sediment compared to its neighbors.
Home to the endangered Arrau turtle and the giant river otter.

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Overnight stops

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Sights nearby

Frequently asked questions

Which natural border does the Río Iténez form?

It forms the border between Bolivia and Brazil.

What is the river called in Brazil?

It is known there as the Rio Guaporé.

Are there protected areas by the river?

Yes, the Noel Kempff Mercado National Park borders it.

What are the main tourist activities?

Sport fishing and wildlife viewing from boats.

When is the water level lowest?

During the dry season from August to October.

Iténez River: where is it located?

Iténez River is located in Bolivia.

Iténez River: when is the best time to visit?

The most pleasant time to visit is May, Jul.

Iténez River: why is it worth visiting?

The Iténez River, also known as the Guaporé in Brazil, is a major waterway in eastern Bolivia, forming a natural border between Bolivia and Brazil for approximately 850 kilometers.

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