The Tödi, is a mountain massif and with the mountain peak Piz Russein the highest mountain in the Glarus Alps and the highest summit in the canton of Glarus, Switzerland. It is located on the border between the cantons of Graubünden, to the south, and Glarus, to the north, close to the point where those two cantons meet the canton of Uri, to the west. Although not the culminating point of Graubünden, it is its highest peak outside the Bernina range.

The Glarus Alps are a mountain range in central Switzerland. They are bordered by the Uri Alps and the Schwyz Alps to the west, the Lepontine Alps to the south, the Appenzell Alps to the northeast. The eastern part of the Glarus Alps contains a major thrust fault that was declared a geologic UNESCO World Heritage Site.