Gfieder, Mountain summit in Ternitz, Austria.

Gfieder is a summit in the Northern Limestone Alps in Lower Austria standing at about 609 meters high. The peak is topped with an observation tower that provides views across the surrounding mountain region.

The first lookout tower on the Gfieder was built in 1887. A 14-metre tower followed in 1988, and in 2004 it was replaced by a new tower owned by the Austrian Tourist Club, Section Ternitz. From the summit the view reaches as far as Lake Neusiedl.

The Vierbrüderbaum is a black pine (Schwarzföhre) that stands west of the Gfieder, already in the municipality of Bürg-Vöstenhof, not on the summit. It dates from 980 and grew four trunks after browsing damage; placed under nature protection in 1930, it was damaged in the war 1939–45, and in 1972 lightning struck two trunks and set the tree alight. Two charred trunks were shed, so only two remain today.

The mountain can be reached via a marked hiking trail starting from St. Johann, with the walk taking around two and a half hours. The path is clearly marked and suited for average hikers without special requirements.

From the viewing platform at the summit, several well-known peaks and landscapes can be seen at once, including Semmering and Schneeberg. This wide perspective makes it a destination for those wanting to see multiple regions in a single visit.