The Isar cycle path runs from the source of the Isar through Scharnitz in the Karwendel-range, through the “Riedboden” nature reserve to Mittenwald, Krün and Wallgau and on to lake Sylvenstein and Lenggries.
From here the Isar cycle path leads to Bad Tölz, Wolfratshausen, via the monastery “Schäftlarn” to Munich, ending in the Danube town of Deggendorf.
You can find out more about the different stages here: