Slapy Reservoir, Water reservoir in Štěchovice, Czech Republic

Slapy Reservoir is a reservoir on the Vltava River in the Benešov Uplands, about 22 km south of Prague, named after the village of Slapy near its dam. Its water surface covers 11.63 km², making it the sixth largest reservoir in the Czech Republic, and the backed-up water reaches 35 m above the original river bed. The dam is a 67.5 m high concrete structure on rock, 260 m long along its crest, with four gated spillway fields and a road across the top.

The dam was built between 1949 and 1955 as part of modernizing the Vltava for energy production and flood control. Heavy floods in 1954 filled the basin ahead of schedule, before all construction work was finished.

This reservoir takes its name from the nearby settlement of Slapy and has offered space for activities like sailing and fishing since the 1950s. Small holiday cottage communities have grown along the banks, turning the river valley into a weekend retreat.

Visitors will find four public camping areas along the shores as well as several small beaches and swimming spots. Access is possible at many points, with narrow roads through the forest leading to parking near the water.

Before the reservoir filled, selected objects threatened by flooding were moved, including a statue of St. John of Nepomuk that stood as the symbol of the Svatojánské proudy rapids. The reservoir's maximum depth is 58 m, and its surface lies at 271 m above sea level.