🇧🇷 Brazil · North (Amazon)
Rio Branco is the capital of Acre, the westernmost state of the Brazilian Amazon, a land of deep jungle, winding rivers and a history as singular as it is gripping. On the banks of the Acre River, near the triple border with Bolivia and Peru, this city grew in the heat of the rubber cycle and of an epic few regions of Brazil can tell: that of a territory that was Bolivian and that, in the early 20th century, became Brazilian after a genuine revolution of the seringueiros.
It's also the land of Chico Mendes, the seringueiro and environmental leader murdered in 1988, who became a global symbol of the fight for the forest and the peoples who live in it. That double identity —rubber and the frontier, and the defence of the Amazon— runs all through Rio Branco, a city of heat, rivers and mixed heritage, where the memory of the seringais, Amazonian culture and the energy of a frontier capital open towards the Pacific live side by side.
One or two days cover the essentials: the historic centre on the banks of the Acre River, with the Mercado Velho (the city's culinary heart), the Palácio Rio Branco and its museum on the Acrean epic, the Praça da Revolução and the lit-up bridges. With an extra day you can reach Xapuri, where the house in which Chico Mendes lived and was murdered is preserved. It's not a mass-circuit destination, but it offers one of the most fascinating stories of the Amazon frontier, tasty cooking with Indigenous and Northeastern roots, and the gateway to the jungle and the roads that connect Brazil with the Pacific along the Interoceanic Highway.
The Acre region was home to many Indigenous peoples and, through the colonial period and much of the 19th century, was part of Bolivian territory, in an area of vague borders deep in the jungle. Everything changed with the rubber cycle: in the late 19th century, thousands of Brazilian migrants, above all Northeasterners hit by drought, came to these seringais to tap latex from the seringueira tree. Once the Brazilian population became the majority in a Bolivian territory, conflict broke out and led to the Acrean Revolution, led among others by José Plácido de Castro. After the war, Bolivia ceded Acre to Brazil under the Treaty of Petrópolis (1903), in exchange for compensation that included building the Madeira-Mamoré railway. Acre first became a federal territory and, in 1962, a state of the Brazilian federation, with Rio Branco as its capital. The city grew on the banks of the Acre River as a centre of the rubber trade and, after its decline, went through new economic and migratory cycles. In the 1970s and 1980s, Acre was the stage for the seringueiros' struggle to defend the forest against deforestation, embodied in the figure of Chico Mendes, murdered in 1988, which turned the state into a global symbol of environmentalism and gave rise to the extractive reserves. The full story is on our history page.
Read the full history ↓Brazil's westernmost state, deep in Amazonia: land of peoples of the Pano family, of seringueiros from the Northeast and of the environmentalist Chico Mendes. It was Bolivian until its settlers brought it into Brazil under the Treaty of Petrópolis of 1903.
Read the history of Acre →No exact prices: a scale from $ (budget) to $$$$$ (luxury), with 2-3 options per category.
Origins, formation and what the sources say.
The history of Rio Branco can't be understood without that of Acre, one of the most singular regions in all of Brazil. Before the Europeans arrived and for centuries afterwards, this land of deep jungle, in the far southwest of the Amazon, was inhabited by many Indigenous peoples of different ethnicities and languages, who lived from hunting, fishing, gathering and farming in one of the most biodiverse regions on the planet.
Through the colonial period and much of the 19th century, Acre was part —on paper at least— of Bolivian territory, in an area of vague, poorly defined borders deep in the jungle, far from the centres of power. The colonial treaties between the Iberian crowns and, later, the agreements between Brazil, Bolivia and Peru left these remote lands in an ambiguous situation, barely explored and with virtually no effective state presence.
That border ambiguity, added to the region's natural wealth —and very especially the abundance of seringueira trees, producers of coveted rubber—, would be the trigger for a conflict that would change Acre's fate forever. The mass arrival of Brazilian migrants drawn by the 'white gold' of rubber, in the late 19th century, set in motion a chain of events that would end up turning this Bolivian territory into a new Brazilian land.
In the late 19th century, world demand for rubber —driven by industrialisation and the young car industry— set off the 'rubber boom' in the Amazon, one of the most intense economic cycles in Brazilian history. The Acre region, with its great abundance of seringueira trees, became one of the major production centres for the coveted latex, the 'white gold' of the jungle.
Tapping rubber needed hands, and they came above all from the northeast of Brazil. Thousands upon thousands of Northeastern migrants, hit by the terrible droughts ravaging their region (especially the great drought of the late 19th century), moved to the Amazon lured by the promise of wealth in the seringais. There they became seringueiros, rubber tappers living in brutally hard conditions, indebted under the system of the 'barracões' and the bosses, deep in the jungle to bleed the trees.
That mass migration had a decisive political consequence: the territory of Acre, formally Bolivian, came to be populated mostly by Brazilians. Within a few years, Brazilian seringueiros and traders were the overwhelming majority of the population of a land that belonged to Bolivia. When the Bolivian government tried to assert its sovereignty and tax rubber production, the clash with that Brazilian population became inevitable, and the conflict caught fire.
The conflict between Acre's Brazilian population and Bolivian sovereignty broke out into a real war in the early 20th century: the Acrean Revolution. The Brazilian seringueiros and settlers, unhappy with the Bolivian government and with the plan to exploit the region through an international consortium (the Bolivian Syndicate), rose up in arms. The revolution went through several phases and among its leaders José Plácido de Castro stood out, a gaúcho who commanded the Acrean forces and became the central figure of the epic.
After the fighting and the proclamations of an 'Independent State of Acre', the Brazilian government —led in diplomacy by the Baron of Rio Branco, the famous foreign minister— stepped in to settle the question through negotiation. The result was the Treaty of Petrópolis, signed in 1903, under which Bolivia ceded the territory of Acre to Brazil. In exchange, Brazil gave Bolivia financial compensation, a small border territory and, above all, the commitment to build a railway —the future Madeira-Mamoré— that would give Bolivia an outlet for its goods bypassing the rapids of the Madeira River.
And so, through a combination of popular revolution and diplomacy, Acre became part of Brazil. The city of Rio Branco —whose name honours precisely the Baron of Rio Branco, architect of the treaty— established itself as the main centre of the new territory. The epic of Acre's incorporation is etched into the Acrean imagination and is still celebrated today in the Praça da Revolução and in the city's memorials.
After joining Brazil in 1903, Acre was first organised as a Federal Territory, administered directly by the central government, given how remote the region was and how recent its annexation. Through those decades, the territory's economy kept revolving around rubber, with the ups and downs typical of the cycle: the boom of the late 19th and early 20th centuries, the crisis when Southeast Asian plantations broke the Amazonian monopoly, and a brief rebound during the Second World War.
The city of Rio Branco, on the banks of the Acre River, grew as the territory's capital and the centre of trade, administration and social life in the region. The city developed around the river, which split it into districts later joined by bridges, and gradually gathered Acre's services and institutions.
Full recognition came in 1962, when the Federal Territory of Acre was raised to the status of a state of the Brazilian federation, with Rio Branco as its capital. That promotion cemented the city as the political, economic and cultural heart of Acre. From then on, and especially with the opening of highways such as the BR-364 that linked it to the rest of the country, Rio Branco went through new waves of growth and migration, becoming the modern capital of one of the most singular states in Brazil.
In the last decades of the 20th century, Acre and its capital became the stage for a struggle that would echo worldwide: the defence of the Amazon rainforest against advancing deforestation. The central figure of that story was Francisco Alves Mendes Filho, known as Chico Mendes (1944-1988), a seringueiro born in Acre who became a union leader and environmental campaigner.
From the 1970s and 1980s, the spread of cattle ranching and deforestation threatened the seringais that the extractive communities lived from. Chico Mendes organised the seringueiros' peaceful resistance through the 'empates', actions in which families physically placed themselves in the way to stop the forest being felled. His struggle joined the defence of the environment with that of the rights and ways of life of traditional peoples, and proposed an innovative model: extractive reserves, areas where the forest is preserved while allowing sustainable use by those who live in it.
Chico Mendes's international profile made him an inconvenient figure for interests tied to deforestation, and in December 1988 he was murdered at his home in Xapuri, in Acre. His death caused worldwide shock and turned Chico Mendes into a global symbol of environmentalism and of the fight for the Amazon. His legacy lives on in the extractive reserves (one of which bears his name), in conservation institutions and in the memory of Acre, where Rio Branco honours this son of the forest who gave his life to protect it.