Colbún Lake (Spanish: Lago Colbún) is a reservoir in the Maule Region in Chile, straddling the provinces of Talca (comuna of San Clemente) and Linares (comuna de Colbún). Located 48 km southeast of the city of Talca, the regional capital and 35 km northeast of the city of Linares and with an area of 5,700 hectares and a capacity of 1,490,000 m³, it is the largest artificial reservoir in Chile.