Hausstock, Mountain summit in Glarus Alps, Switzerland

Hausstock is a 3,158 m summit of the Glarus Alps on the border between Glarus and Grisons, overlooking the Linth, Sernf and Vorderrhein valleys. Its upper flanks are built of Verrucano rock sitting on chalk and flysch of the Glarus thrust, visible at about 2,950 m. A 2 km ridge links it south-west to the Ruchi (3,107 m).

In October 1799, Russian General Alexander Suvorov retreated with his army over the Panix Pass below the Hausstock, escaping French Revolutionary forces in Italy. The crossing is often cited in 19th-century British mountain guides, and a plaque in Pigniu commemorates it. The first recorded ascent of the mountain was made in 1832, according to American mountaineer W. A. B. Coolidge.

The Hausstock was already a known goal for British and American climbers in the nineteenth century, and William Martin Conway included it as a stage of his "North Tour through the Alps". The Irish naturalist John Ball described the trek through the Panix Pass beneath the mountain in several of his works. The Panixerpasshütte in the pass serves climbers today.

The usual ascent starts from Elm, the highest village below the mountain, and the Panixerpasshütte in the Panix pass serves as a base. The south ridge from Piz Fluaz is rated ZS and becomes high-alpine just before point 3096, while the east ridge and east flank are easier at WS. A two-day route from the Vorderrheintal crosses the Kistenpass, Muttseehütte and Hintersulzlücke, then returns over the glacier da Mer and the Panixerpass with fixed ropes and easy climbing.

At about 2,950 metres on the mountain, the Glarus thrust is visible as a line where 250–300-million-year-old Verrucano rock lies directly on 35–50-million-year-old flysch. This overthrust was declared a geotope and included in the UNESCO World Heritage Swiss Tectonic Arena Sardona in 2008.