Lago Colbún is the largest artificial reservoir in Chile, situated in the Maule Region at an elevation of 440 metres above sea level, straddling the provinces of Talca and Linares. Constructed between 1980 and 1985 to dam the waters of the Maule River for agricultural irrigation and hydroelectric power generation, the lake covers a surface area of 57 square kilometres (approximately 5,700 hectares) with a total water capacity of 1,490,000 cubic metres. Located 48 km southeast of the city of Talca and 35 km northeast of Linares, the reservoir sits in the precordillera foothills of the Andes, offering a dramatic mountain backdrop and a diverse aquatic environment shaped by its role as a managed hydroelectric and irrigation impoundment. The lake's position in the Maule precordillera means it benefits from Andean snowmelt feeding the Maule River, and summer water temperatures can reach 23°C, making it a popular destination for both fishing and water sports.