What makes it 78% Couple-Friendly: The quiet riverside hike, benches, and an alpine hut meal create a relaxed, scenic date, but the 20 km return walk demands reasonable fitness and offers little shelter in bad weather.
Why 1 day visit duration is ideal for couple trip: Allows a full hike to the spring, time for a picnic at Kastenalm, and optional bike or wagon tour.
Riverside hike to the Isar source:
Follow the valley track from Parkplatz P2 for about 10 km to the karst spring.
Tip: Start at Naturpark-Infozentrum Scharnitz; carry snacks and water; benches mark the spring.
Picnic at Kastenalm hut:
Take a break at the private Kastenalm around 5 km before the source.
Tip: Order Tyrolean snacks; check opening days (Thu–Sun, June–Oct). Reserve a table on busy weekends.
Tractor-wagon nature tour:
Join a guided wagon ride through Gleirschklamm ending with lunch at Möslalm.
Tip: Book in advance via felix.baecker@karwendel.org to secure your spot.
Bike & hike loop:
Rent a mountain bike in Scharnitz and ride 14 km to the spring, then hike the last segment.
Tip: Lock bikes before hiking; cycle back along the same flat gravel path.

Trupti Bongale
Super Holiday Spot... 👌 👍
Mubarak AlSulaiti
We had fun with the family and we went swimming in the middle of the cold river in the summer. I recommend visiting it
Gary Morris
Nice walk on long forest road up to Hallerangerhaus. The road is steep at the end and gravel all the way to he Hütte. No problems walking in the rain. Beautiful scenery
Aleksey Petrushko
Well, this is such a beautiful route along the river between high mountains to reach the source of Isar from Scharnitz. Good road conditions for cycling 🚴♂️ even with a kids trailer attached. Highly recommended for a day/half a day trip.
paul thomas
Incredible bike path and astounding views
Visit June–October for hut service; snow covers the trail in winter, check conditions before you go.
Explore These Activities
| Item | Cost (Approx.) |
|---|---|
| Day parking at Parkplatz P2 | EUR 7 |
| Snacks at Kastenalm (2 people) | EUR 30 |
| Mountain bike rental (2 bikes) | EUR 40 |
| Total Estimated | EUR 77 |
Note: All prices are indicative and may vary. Please check directly with the venue for the most accurate and up-to-date information.
Content Notice: This content combines editorial expertise with AI assistance to ensure comprehensive and up-to-date information. Our team regularly curates and reviews all content for accuracy and relevance. Help Us Improve
Address: 6108 Scharnitz, Austria
Map will load when you scroll here
Scroll down to view the interactive map
Looking for other Things to Do besides Isar Ursprung, Naturpark Karwendel (Innsbruck)?
How You Can Support Us
If our website helps you, please support us by booking your travel needs through this link: Book Flights, Hotels, Activities on Trip.com - New App User Promo up to 10% OFF. We may earn a small affiliate commission - at no extra cost to you!
It's a simple way to help us keep the site running and improving for everyone. Thanks for your support!
10 BEST nearby Activities