Torfau, Nature reserve in Ulrichsberg, Austria.

Torfau is a nature reserve in Ulrichsberg featuring wetlands, meadows, and waterways that together form a diverse ecosystem. The landscape with its different moist habitats provides living space for rare bird, insect, and plant species.

The area was officially protected in 2006 to preserve the region's rare bog and moist habitats. This designation was part of a conservation program aimed at maintaining these valuable ecosystems in Upper Austria.

The names Seitelschläger and Berdetschläger Wiesen refer to the neighbouring hamlets of Seitelschlag and Berdetschlag. The meadows are still farmed extensively, using a labour-intensive irrigation method traditional in the upper Mühlviertel. At the edge of the reserve stands the Berdetschläger Bauernmühle, a farm mill acquired with the land from 1983.

Visitors can hike on marked trails throughout the reserve and should follow signs to respect protection rules. It is best to wear sturdy shoes and waterproof clothing since the moist ground, especially in bog areas, can be slippery.

The Torfau was once part of a larger meadow landscape along the Große Mühl, and peat was cut here between the wars for heating. Since 1983 the Österreichische Naturschutzjugend has bought and tended the area, including the Berdetschläger Bauernmühle at its edge, as an "Öko-Insel".