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Griesssee Geology Hike – Glacial Lake at Klausenpass

Step into the world of alpine glacial landscapes


This guided geology hike at Klausenpass in the Swiss Alps leads to Griesssee, a true alpine glacial lake shaped by ice and time. Starting near Urnerboden, we explore how glaciers carved high-mountain basins and left behind moraines, debris slopes, and dramatic alpine scenery at nearly 2,000 metres above sea level.


The Glacial Geology of Klausenpass and Griesssee

The Griesssee basin offers an excellent setting for observing high-alpine geomorphology. As the trail climbs from alpine meadows into increasingly rocky terrain, the landscape gradually reveals the powerful natural processes that shaped this mountain environment. Certain geomorphological features and field interpretations are explained exclusively during the guided tour.


Practical information

  • Length: 5.5 km
  • Duration: approx. 2.5 h + stops
  • Best season: July-September
  • Difficulty: Moderate
  • Elevation profile: 1940-2170 m (+291 m / -291 m)
  • Trail conditions: Slippery rock surfaces, uneven terrain
  • Required equipment: Hiking boots / sturdy trail shoes
  • Price: 125 CHF / person
  • Meeting point: Klausenpass Hütte parking (free parking)

Route of the Griesssee glacial lake hike at Klausenpass in the Swiss Alps, Switzerland.
Route of the Griesssee glacial lake hike at Klausenpass in the Swiss Alps, Switzerland.

Who Is This Hike For?

  • For High-Alpine Explorers: Designed for those who love the raw, monumental rock world above 2,000 meters, where snow patches often linger even in high summer.

  • For Glacier Seekers: Ideal if you are drawn to Ice Age remnants, moraine ridges, and the sight of turquoise lakes colored by milky glacial flour.

  • For Photographers: The ice floes of Griesssee (seasonal) set against the towering Clariden peaks offer a dramatic, world-class composition.

  • For the Inquisitive Mind: For those who want more than just a view - learn to "rewind" time to the peak of the Ice Age by reading the landscape's features.

Geotrekkerz Tip: No prior geological knowledge is required—we uncover the secrets of the landscape through clear, engaging, and fascinating insights.


Booking & Availability

Due to high-altitude conditions, this geology journey is exclusively available during the peak summer season (July to September). Our small-group setting ensures a personal atmosphere and in-depth geological field insights.

Secure your place in the realm of ice early to guarantee your spot!

Looking for a custom-crafted exploration? If you prefer a more flexible schedule or wish to join us with your friends on a specific date, choose our Private Geological Tours. We will fully adapt the pace and the topics to your interests and needs!