The lake is of mixed glacial and tectonic origin. It is 2,120 m (6,960 ft) long and 1,380 m (4,530 ft) wide, with a maximum depth of 29.5 m (97 ft), and it has a small island. The lake lies in a picturesque environment, surrounded by mountains and forests. Medieval Bled Castle stands above the lake on the north shore. The Zaka Valley lies at the west end of the lake.
The World Rowing Championships in 1966, 1979, 1989, and 2011 were held at Lake Bled.