About Slapy Dam

Slapy Reservoir sits on the Vltava River approximately 40 kilometres south of Prague, making it the most accessible large reservoir to the Czech capital and the most visited recreational water body in the country. The concrete gravity dam was completed in 1955 and stands 67 metres tall, impounding 270 million cubic metres. As part of the Vltava Cascade, Slapy serves both hydroelectric generation and flood control for Prague downstream. The reservoir stretches over 42 kilometres and is flanked by steep wooded hills cut through by the ancient Vltava valley. On summer weekends the shores teem with campers, boaters, and swimmers, while the calmer spring and autumn months attract anglers and hikers. The historic town of Štěchovice sits near the dam's base, and several riverside villages survived the flooding, their church spires visible above the waterline. Slapy is also home to one of the longest natural swimming areas in Bohemia.