Anninger, Mountain summit in Gaaden, Austria

Anninger is a 675 meter high mountain in the Wienerwald region with steep slopes and multiple hiking trails crisscrossing its terrain. The landscape features wooded areas, open sections, and natural formations that create varied scenery along the routes.

In 1887 a stone lookout tower, the Wilhelmswarte, was built on the summit and named after Archduke Wilhelm; a wooden tower had stood there since 1877. From the Anningerschutzhaus a natural toboggan run led down to Mödling, built by the Erster Anninger Rodelverein founded in 1907; an international toboggan race on 14 February 1909 set an Austrian record over one kilometre. A second, 1700-metre artificial toboggan track opened in 1928 toward Hinterbrühl and was shortened after a fatal accident in 1935. Resin tapping (Pecherei) was a source of income across the area.

The mountain serves as a popular destination for day-trippers and hikers from Vienna and surrounding areas. Visitors gather at the mountain huts to rest and enjoy meals together during their outings.

The trails to the summit are accessible from various starting points including the village of Gumpoldskirchen, with hiking times varying depending on the route chosen. Good footwear is important since the paths can be steep and slippery when wet.

The Dreidärrischenhöhle on the southeastern slope toward Gumpoldskirchen is the largest cave in the Wienerwald. The Einödhöhlen lie on the southern slope of the Pfaffstättner Kogel. Since 2010 a copy of Josef Kyselak's graffiti has appeared on the parapet of the Wilhelmswarte.