Hauenstein, Mountain summit in Graz-Umgebung, Austria

Hauenstein is a mountain summit near Graz offering views across the surrounding Styrian farmland and forest. From the top you can see across open countryside and rolling hills stretching toward distant ridges.

The hill was long known as Keltenhügel, a name recorded by a butterfly collector in 1935. Its limestone was quarried at the Kollermichl quarry, which was abandoned in 1954 and left a 26 m high rock face. In the 1990s remains of a lime kiln still stood at the Linecksattel. The City of Graz bought 8.5 ha around the quarry in 2008.

The hill was long known as Keltenhügel, a name recorded by a butterfly collector in 1935. In the 19th century its mild climate supported viticulture, and until the mid-20th century the slopes were dry meadow with scattered shrubs. Since 2008 the City of Graz has owned 8.5 ha around the quarry, cared for by the Naturschutzbund.

You can reach the summit via marked hiking trails starting from a nearby parking area with roughly 45 minutes of walking time required. The paths are well-marked and typically in good condition during the warmer months.

The abandoned Kollermichl quarry on the southeast flank closed in 1954; of the 185-metre-long, 60-metre-deep Schöcklkalk works, a rock face about 26 metres high remains. The quarry floor was partly filled with foreign material in 1998 and is freely accessible. Calcite twins and columnar staurolite crystals up to 1.5 cm long were found here.