Olešná Reservoir, reservoir in Frýdek-Místek, Czech Republic

Olešná Reservoir is a dammed reservoir on the Olešná stream at the south-western edge of Frýdek-Místek, built between 1960 and 1964. Its surface covers 88 hectares and it holds 3.5 million m³ of water, with an average flow through the reservoir of 0.54 m³/s. Open-air and covered aquaparks opened on the northern shore in 2005 and 2006.

Olešná Reservoir was built between 1960 and 1964 on the Olešná stream at the south-western edge of Frýdek-Místek. Plans arose in the late 1950s with a proposed expansion of the Vítkovice ironworks; the new blast furnaces were never built, but the dam went ahead for flood protection and recreation. Since 1983 it has also supplied water directly to the Biocel Paskov pulp mill downstream.

The name Olešná comes from the river that feeds the reservoir. Locals value this place as a gathering spot where families picnic, sit by the water, and spend unhurried afternoons together.

A car is the best way to reach the site, with parking available near the boat launch areas. Kayaks, paddleboards, and small boats can be rented on-site, and well-maintained cycling and walking paths circle the entire reservoir.

The reservoir holds 3.5 million m³ of water and covers 88 hectares. Since 1983 it has supplied water directly to the Biocel Paskov pulp mill downstream, after the planned expansion of the Vítkovice ironworks that prompted its planning was never built.