Qualla: Rio Branco, Acre

Rio Branco, Acre: Introduction

Thu, 16 Apr 2026 00:00:00 GMT

Photo credit Iorran93pontobeerre, CC BY-SA 4.0. The Gameleira tree still stands at the bend of the Acre River, a strangler fig with a 2.5-meter trunk and a twenty-meter canopy, older than the city that grew up around it. In the 1880s, workers putting up the first shacks on the riverbank chose that spot because it was easier than clearing the forest. A few years later, the same tree was standing in the middle of the fighting at Volta da Empresa, where Acrean revolutionaries pushed back Bolivian troops during the short, strange war that ended with Acre becoming Brazilian. Rio Branco - capital of the state of Acre, population about 388,000 in 2024 - grew up around a tree that saw both its founding and its independence.

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Image: Iorran93pontobeerre | CC BY-SA 4.0

Rio Branco, Acre: Built on Rubber

Thu, 16 Apr 2026 00:00:00 GMT

Photo credit Iorran93pontobeerre, CC BY-SA 4.0. The lands where Rio Branco now sits were once home to the Aquiri, Canamari, and Maneteri peoples. The rubber tappers who arrived in the late 19th century were mostly Brazilians - drawn west by the rubber boom, working the hevea trees of what was then technically Bolivian territor...

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Image: Iorran93pontobeerre | CC BY-SA 4.0

Rio Branco, Acre: Two Banks of the Same River

Thu, 16 Apr 2026 00:00:00 GMT

Photo credit Agencia de Noticas do Acre, CC BY 2.0. Rio Branco sits at 143 meters above sea level, straddling both banks of the Acre River. The political administration was eventually moved to the left bank - higher ground, less prone to flooding - while the original commercial zone on the right bank gradually declined. By the 193...

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Image: Agencia de Noticas do Acre | CC BY 2.0

Rio Branco, Acre: Floods and Frosts

Thu, 16 Apr 2026 00:00:00 GMT

Photo credit Tojolo, CC BY-SA 3.0. The climate is tropical monsoon, and most of the year the weather does what you would expect near nine degrees south: hot, humid, with heavy rain from October through May and a shorter dry season from June to September. Rio Branco has the lowest average annual temperature of any ...

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Image: Tojolo | CC BY-SA 3.0

Rio Branco, Acre: Santo Daime's Home Ground

Thu, 16 Apr 2026 00:00:00 GMT

Photo credit M. Aranha, Public domain. One of Rio Branco's most unusual landmarks is the tomb of Raimundo Irineu Serra, the rubber tapper from Maranhao who moved to Acre and founded the religion now called Santo Daime. His sepulcher sits in the Alto Santo neighborhood and has become a pilgrimage site for Daimistas aro...

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Image: M. Aranha | Public domain

Rio Branco, Acre: Rubber, Brazil Nuts, and What Comes Next

Thu, 16 Apr 2026 00:00:00 GMT

Photo credit Brazil_location_map.svg: NordNordWest derivative work: Виктор В (talk), CC BY-SA 3.0. Historically the economy depended on two forest products: natural rubber and brazil nuts. Today wood is the main export of the state of Acre, along with acai fruit, cassava flour, copaiba oil, and beef. Rio Branco is trying to reinvent itself through agribusiness, aquaculture, an...

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Image: Brazil_location_map.svg: NordNordWest derivative work: Виктор В (talk) | CC BY-SA 3.0