The Grosser Mythen (also Grosse Mythe) is a mountain in the Schwyzer Alps of Central Switzerland. The mountain lies in the canton of Schwyz, to the east of the town of Schwyz, and to the south of the village of Alpthal in the valley of the river Alp.
It is accessible from the Holzegg by a hiking trail which is opened during the summer months only. Geologically the Mythen is a penninic Klippe.
