Roučkovo jezero

Roučkovo jezero is a small, roughly one-hectare lake in the western part of Brno-Tuřany, within the cadastral area of Holásky. It forms part of the Holásecká jezera complex — a group of protected lakes designated a nature monument, sitting between the D1 and D2 motorways on Brno's southeastern edge.

Where is Roučkovo jezero and how do you get there?

The lake lies in the Holásky cadastral area, on the western fringe of the Brno-Tuřany district. The whole Holásecká jezera complex stretches across the land bounded by the D1 motorway on one side and the D2 on the other, which makes it fairly easy to locate even without major landmarks nearby. It's a quiet spot away from the city center, visited mainly by residents of the surrounding neighborhoods and by nature enthusiasts.

How did the lake form?

Unlike several neighboring lakes — Opleta, Kocábka, and Lávka — which were created by former clay extraction, Roučkovo jezero belongs to the group of lakes with a natural origin. It formed where an old branch of the Svitava river split apart, leaving behind pools of water cut off from the main current. This natural origin sets it apart from many other lakes around Brno, most of which are former extraction pits.

Why is the area protected?

The entire Holásecká jezera complex, Roučkovo jezero included, was granted nature monument status in 1987. The designation reflects the value of the local wetland ecosystems and the habitats they provide, offering shelter and breeding grounds for numerous animal species. The site functions as a natural biodiversity refuge amid a heavily urbanized and industrial stretch of Brno, so visits should be limited to observation from marked paths, without disturbing the vegetation or shoreline zones.

What wildlife lives around the lake?

The waters of Holásecká jezera, Roučkovo included, are home to numerous invertebrates, among them the great pond snail and the great ramshorn snail. Fish species found here include bream, common carp, tench, European perch, and northern pike. The amphibian population is also rich — frogs and toads dominate, finding favorable breeding conditions in the calm, shallow water and dense shoreline vegetation. The presence of amphibians and waterfowl was one of the main reasons the area was placed under protection.

What should you know before visiting?

Roučkovo jezero suits visitors looking for a quiet encounter with nature rather than developed tourist infrastructure — there are no beaches or food stalls typical of larger recreational lakes in the immediate vicinity. Given its nature monument status, it's worth taking extra care around the local flora and fauna and sticking to the marked paths. It makes a good stop for a short walk combined with a visit to the other lakes of the Holásecká jezera complex.

Frequently asked questions

Where is Roučkovo jezero located? In the western part of Brno-Tuřany, in the Holásky cadastral area, as part of the Holásecká jezera complex between the D1 and D2 motorways.

How did Roučkovo jezero form? It formed naturally, where an old branch of the Svitava river split apart — unlike several neighboring lakes that were dug out through clay extraction.

Is Roučkovo jezero protected? Yes, along with the entire Holásecká jezera complex, it has held nature monument status since 1987 due to its valuable wetland ecosystems.

What animals can be found here? Aquatic invertebrates (great pond snail, great ramshorn snail), fish (bream, common carp, tench, perch, pike), and numerous frogs and toads.

Are there beaches or food stalls by the lake? No, it's a nature-focused site without developed recreational infrastructure — best suited to a quiet walk and wildlife observation.