From 29 October to 6 November 2026, the flow measurement station at the source of the Isar River will be renovated. Due to construction work in the area of the Isar source, traffic disruptions and longer waiting times may occur on the road towards Kastenalm.
Start Point
Naturpark Info Center Scharnitz (P2)
End Point
Naturpark Info Center Scharnitz (P2)
Difficulty
Medium
Total Distance
28,20 km
Descent Meters
335 m
Ascent Meters
335 m
Highest Point
1222 m
Total Time
07:00 h
Status
Stamina
Technique
Best Time
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
In an emergency
In an emergency
Guest card = ticket
Guest card = ticket
Hikes to waterfalls
Hiking tour
Hut hike
The hike begins at the Nature Park Information Center in Scharnitz, located right by parking lot P2. From here, the trail follows the Hinterautalstraße straight into the Hinterautal valley. After about 2.5 kilometers, the paved road transitions into a forest path that continues through the picturesque valley. The trail gradually ascends, leading to the Gleirschhöhe, a viewpoint marked with a cross that offers stunning views of the surrounding mountains.
From the Gleirschhöhe, the path turns left and continues towards the Isarursprung (the source of the river Isar) and Kastenalm. A short descent brings hikers into the valley floor, where the landscape opens up, and the clear, rushing waters of the Isar accompany the trail. This section of the hike is particularly charming, as the crystal-clear river becomes a constant companion, winding through pristine nature.
The highlight
