Hidden Waters

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.)