segment of the Central Alps lying north of the Vorderrhein River mainly in Glarus canton of east-central Switzerland. The mountains extend east to the Rhine River and north to the Walensee (lake) and Klausen Pass. Many of the peaks are glacier-covered, including the highest, Tödi (11,857 ft 【3,614 m】). Along the northern slopes are pastures used for cattle raising and dairying. There are also popular health resorts and winter sports areas within the region. The Glarus Alps, as part of the larger Swiss Tectonic Arena Sardona, were designated a UNESCO World Heritage site in 2008.