Flims Rockslide – Groundwater – Lakes, UNESCO World Heritage Tectonic Arena Sardona

We hike across the debris of the Flims Rockslide, the largest landslide event in the Alps. Unique waterways have formed within the rockslide debris. The mysterious, turquoise-glittering lakes hidden in the forest offer us insights into this underground water network.

From our meeting point, we enjoy a leisurely hike to Lag Prau Pulté, cross the Flims bypass road, and continue to Lag Prau Tuleritg and Lag la Cauma. At various stops, we will address questions such as: How was the age of the Flims Rockslide determined? How fast does groundwater flow? Why do the water levels of the lakes fluctuate?

Guide:
Stefanie Wirth: Geologist/Hydrogeologist (MSc, PhD), GeoGuide of the UNESCO World Heritage Tectonic Arena Sardona

Meeting Point:
13:00 at the "Flims Waldhaus, Promenada" bus stop
(street side heading towards Laax)

End of Tour:
ca. 16:30 at Lag la Cauma
(end of the guided tour, option to return to Flims Waldhaus together)

Hike Details:
- Actual walking time: 1.5 hours, ascent: 150 m, descent: 250 m, distance: 5 km
- Difficulty: predominantly T1, short section T2 (hiking scale of the Swiss Alpine Club SAC)

Equipment:
- Sturdy footwear with treaded soles
- Clothing adapted to the weather conditions
- Snacks/drinks from your own backpack

Cost:
CHF 45.– per person
(CHF 20.– discount for members of the UNESCO World Heritage Tectonic Arena Sardona Association)

Registration:
by October 2, 2026, to Stefanie Wirth: mail@geologin.ch or +41 79 562 60 15

Execution:
In the event of very poor weather conditions, I reserve the right to cancel the tour or modify the program.

Insurance:
Insurance is the responsibility of the participants.


(Deutsch auf Anfrage. / Français sur demande.)