🇪🇨 Ecuador · Amazon (Oriente)
Nueva Loja, known to almost everyone as Lago Agrio, is the capital of the Amazonian province of Sucumbíos, in Ecuador's far northeast, very close to the Colombian border. It's a young, hot, bustling city that was born and grew out of the oil boom of the sixties and seventies: the name 'Lago Agrio' is itself a translation of Sour Lake, Texas, in reference to the birthplace of Texaco, the company that started drilling in the area. Today it's a commercial and logistical hub of the oil-producing Oriente.
For travelers, Lago Agrio is rarely a destination in itself: above all it's the main gateway to the Cuyabeno Wildlife Production Reserve, one of the most extraordinary places to see Amazonian wildlife in Ecuador. Most Cuyabeno tours set out from here: these days you mainly arrive by bus from Quito (the local airport lost its scheduled commercial flights in 2020), and from the city or straight from the Puente Cuyabeno the road and river transfers head out to the lodges in the flooded forest.
This guide takes Lago Agrio on practical terms: how to get there, what to expect from the city, how to organize your entry to Cuyabeno and what to bear in mind in a border and oil region. It's not a picture-postcard tourist city, but a useful transit point and the threshold of one of the country's great nature adventures.
Lago Agrio began as an oil camp in the late 1960s, when the Texaco-Gulf consortium drilled the first commercial well in the Ecuadorian Amazon in 1967. The name evokes Sour Lake, Texas. Oil transformed the Oriente and drew settlers from all over the highlands and the coast, giving rise to a fast-growing city. The drilling also left a serious environmental liability, the subject of one of the most famous environmental lawsuits in the world (the Chevron-Texaco case). The full version is on our history page.
Read the full history ↓The province of the far northeast, the oil heart of the Amazon: land of the Cofán, Siona, Secoya and Kichwa peoples, birthplace of the crude oil boom at Lago Agrio (1967) and of the historic Chevron-Texaco lawsuit, with the Cuyabeno Reserve of blackwater lagoons and a lively border with Colombia.
Read the history of Sucumbíos →No exact prices: a scale from $ (budget) to $$$$$ (luxury), with 2-3 options per category.
Origins, formation and what the sources say.
Long before any city existed, the northeastern Amazon that is now Sucumbíos province was the territory of Indigenous peoples deeply bound to the forest and its rivers. The Cofán (who call themselves A'i), the Siona and the Secoya (the latter two speaking Western Tucanoan languages) lived along the banks of the Aguarico, San Miguel and Cuyabeno rivers, off hunting, fishing, growing cassava and plantain, and a deep knowledge of medicinal and ritual plants such as yagé (ayahuasca).
These river-going, hunting peoples had a social organization built on the extended family and on shamanism, and a worldview in which the river, the forest and their spirits were the center of life. Their contact with the outside world was sporadic for centuries: missionaries, rubber traders and explorers arrived at different moments, often with dramatic consequences (epidemics, enslavement during the rubber boom at the end of the 19th century and the start of the 20th).
That Indigenous inheritance is still alive. The Cofán, Siona, Secoya and Kichwa communities of the region are today the guardians of much of their ancestral territory, especially inside protected areas such as the Cuyabeno Wildlife Production Reserve, and they are central figures in community tourism and in the defense of the Amazon against extractive pressure.
Nueva Loja, universally known as Lago Agrio, is one of the youngest and most peculiar cities in the Ecuadorian Amazon. Its origin is inseparable from oil. In the middle of the 20th century, the northeastern region of Ecuador was a vast stretch of forest thinly populated by Indigenous peoples such as the Cofán (A'i), the Siona and the Secoya, alongside Kichwa settlers.
Everything changed in 1967, when the consortium formed by the Texaco and Gulf companies drilled the first commercial oil well in the Ecuadorian Amazon, the Lago Agrio 1 well. The name 'Lago Agrio' is the Spanish translation of 'Sour Lake', the town in Texas where the Texas Company (Texaco) had been born at the start of the century. So a North American place name stuck to the oil camp that grew up around the well.
The official city was named Nueva Loja, in memory of the many settlers from the Andean province of Loja who came to populate the area. But in everyday speech and in practice, the name that prevailed was Lago Agrio, testimony to the weight the oil industry has had, and still has, in the region's identity.
The discovery of oil at Lago Agrio completely transformed the Ecuadorian Amazon and, with it, the national economy. In the early 1970s, with the building of the trans-Ecuadorian pipeline (SOTE) that carried crude from the Oriente to the port of Esmeraldas on the Pacific, Ecuador became an oil-exporting country, which marked a decade of growth and modernization.
The oil boom drew a wave of settlers from the highlands and the coast who arrived along the new network of roads opened up for extraction. Villages and towns sprang up along the routes. Lago Agrio became the main urban center of the northeast and, in time, the capital of the new province of Sucumbíos, created in 1989.
This rapid, disorderly growth left deep marks: deforestation, pressure on Indigenous territories and a heavy environmental impact. The city went from being a camp to a chaotic, thriving commercial hub, a reflection of the oil-driven Amazon with all its contradictions: wealth and environmental liability, development and conflict.
Oil extraction in the Lago Agrio region left an environmental legacy that became one of the most famous and drawn-out lawsuits in the world. Over the decades of operation, there were allegations that produced water and toxic waste were dumped in open-air pits and in local rivers, with grave consequences for the health of Indigenous and settler communities and for Amazonian ecosystems.
From the 1990s onward, affected communities began legal action against Texaco, later acquired by Chevron. The case, known as 'Lago Agrio' or the Chevron-Texaco case, turned into a long international legal battle that stretched over decades and across courts in Ecuador, the United States and international arbitration, with rulings and counterclaims on all sides. Beyond its legal twists, the case made Lago Agrio a worldwide symbol of the debate over the environmental liabilities of the oil industry.
Today the region keeps that double face: on one side, it remains an oil hub; on the other, it is the gateway to some of the most biodiverse areas on the planet, such as the Cuyabeno Reserve, which places it at the center of the tension between extraction and conservation that defines the contemporary Amazon.
Against the image of an oil hub, the Lago Agrio region also holds one of Ecuador's natural treasures: the Cuyabeno Wildlife Production Reserve, created in 1979 and later extended to more than 590,000 hectares. It's one of the largest protected areas in the Ecuadorian Amazon and a mosaic of flooded forest, black-water lagoons, rivers and terra firme forest with extraordinary biodiversity: more than 500 bird species, pink river dolphins, manatees, monkeys, caimans, anacondas and lush vegetation.
From the end of the 20th century, Cuyabeno became a benchmark ecotourism destination, with lodges and community tourism programs run together with the Siona, Secoya, Cofán and Kichwa peoples. This activity gives communities an economic alternative to extraction and an incentive to conserve the forest.
So Lago Agrio and Sucumbíos embody the great tension of the contemporary Amazon: on one side, the oil economy that gave rise to the city; on the other, the urgency of protecting ecosystems and cultures that are unique in the world. For travelers, the city is the threshold of that living Amazon, and the door to one of the most intense nature experiences in the country.