Biking: Mittenwald is a perfect starting point for numerous bike tours of various levels of difficulty. From a leisurely after-work tour to a demanding day tour in the high mountains (e.g. Karwendel circuit).
There are several specialist shops with bike rental and the possibility of booking guided bike tours with local bike guides.
Baden: The beautiful, crystal-clear mountain lakes such as Lautersee, Ferchensee, Wildensee, Barmsee and Geroldsee provide the necessary cooling.