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.

The Schwyz Alps are a mountain range in Switzerland. They form part of the North-Eastern Swiss Alps and are bordered by the Glarus Alps to the east, the Appenzell Alps to the north-east, the Emmental Alps in the west, and the Uri Alps to the south-west. The Klausen Pass is the highest point between the Schwyz Alps and the Glarus Alps.