Perućac lake, Artificial reservoir at the Drina River border between Bosnia and Herzegovina and Serbia.

Perućac Lake is an artificial reservoir at the Drina River border between Bosnia and Herzegovina and Serbia, extending for 58 kilometers with depths reaching 80 meters. The lake holds roughly 340 million cubic meters of water between Višegrad and Bajina Bašta.

The lake was created in 1966 through the construction of a dam for the Bajina Bašta hydroelectric power station, a joint effort between Japanese and Yugoslav companies. This project transformed the landscape and how the Drina valley was used.

The Mramorje necropolis near the lake holds 88 visible tombstones from the 14th and 15th centuries, cut from single white limestone blocks weighing three tons or more. All are plain except one bearing a circle-shaped ornament. The stones' shapes include slabs, boxes and gable roofs, and locals called them mramorovi, giving the site its name.

The tourist season runs from June to August. A pontoon beach with four children's pools and a separate lake entry stood near the dam from the early 1970s until it closed in 2021 for safety reasons. Boats leave the shore for Višegrad, 25 km down the Drina, with a stop at the Višegrad bridge. The Drina Regatta starts at the dam and runs 25 km to Rogačica.

The Drina Regatta, held each July, runs 25 km from the dam at Perućac to Rogačica; in 2010 it drew 10,000 participants. The lake also hosts a world championship in huchen fishing, where winning catches reach 5 kg. The 93-metre dam that created the lake stands near the village of Perućac.