Luftseilbahn Iltios–Chäserrugg, Aerial cableway in Unterwasser, Switzerland.

The Luftseilbahn Iltios–Chäserrugg is a reversible aerial cableway running from the Iltios station at 1339 m to the Chäserrugg summit at 2262.4 m. It is the upper section of the ascent from Unterwasser, whose funicular reaches Iltios; both are operated by Toggenburg Bergbahnen AG. Its cabins hang from a silver-grey frame with angled struts on parallel cables, with a light blue and white body, a darker blue band along the bottom and a row of windows around the upper half.

A first concession request for a cableway from Iltios to Chäserrugg was submitted in 1961; the concession was granted in 1966, but financing problems stopped the build. Construction finally began in 1971 and the line opened in 1972. In 1991 the cableway and funicular companies merged into Bergbahnen Unterwasser-Iltios Chäserrugg AG, taken over by Toggenburg Bergbahnen AG in 2008.

The cableway serves as a vital link in the Toggenburg winter sports infrastructure, bringing visitors to ski runs, hiking paths, and mountain inns throughout the region.

The cableway runs in both winter and summer: skiers and snowboarders use it in winter, hikers in summer. It is the upper section of a two-stage ascent, continuing from the Iltios station of the funicular from Unterwasser. Since 2015 a gondola has supplemented it and relieved the tram. Conditions at 2262 m are colder and windier than in the valley, so bring weather-resistant clothing.

The system creates a continuous ascent from Unterwasser valley to the Chäserrugg peak, gaining over 1000 meters in elevation through multiple stages. This multi-stage setup allows visitors to explore the mountain gradually instead of attempting a single steep climb.