Grimsel Test Site

Guided tours of the Grimsel Test Site possible again as of 15th June

We are pleased to be able to offer guided tours of the Grimsel Test Site again for up to 20 visitors. If you would like to sign up a larger group, we will try to prepare an individual programme with you.

Your protection and that of the rock laboratory staff are very important to us. We comply with official hygiene measures and responsible for their implementation.

Hand hygiene stations have been set up at the most important locations. We provide masks free of charge and will hand these out to you on site. We kindly ask you to wear the protective masks during your entire tour of the Grimsel Test Site. 

In accordance with official instructions, we will keep your contact details on the registration list for 14 days, after which they will be completely destroyed. The cantonal medical service may request the contact details if it considers it necessary to do so.

We thank you for your understanding and look forward to your visit.

Guided tours of the Grimsel Test Site

The Grimsel Test Site offers tours for groups of at least ten visitors from Monday to Saturday. Please note that early registration is essential. Tours for groups of fewer than ten people are available upon request. Guided tours take place from the start of June until mid-October. They last two and a half hours and are free of charge. The meeting point of the Grimsel Test Site (large parking space in Guttannen) can be reached by public transport (post bus) or private vehicle.

A tour includes:

  • Minivan transfer to the rock laboratory through the main access tunnel of the Oberhasli hydropower plant (20 mins)
  • Introduction and subsequent tour of the rock laboratory (100 mins)
  • Minivan transfer back to Gerstenegg (20 mins)

Register for a guided tour

Please contact Renate Spitznagel (see box on right for contact details) to register for a guided tour of the Grimsel Test Site. We look forward to your visit.

International research

Nagra has been operating the Test Site on the Grimsel pass in the Bernese Alps since 1984. Scientists from all around the world conduct their research in the crystalline rocks of the central Aar Massif. Researchers can access the laboratory year-round. Numerous research projects in all geoscientific and engineering fields provide information on crystalline rock as a potential host formation, on the functioning of the engineered safety barriers and on the transport behaviour of harmful substances in the safety barriers and the rock. The Grimsel Test Site is a platform where know-how is exchanged and where guided tours offer an opportunity for active dialogue with the public and politicians.

We look forward to welcoming you to the Grimsel Test Site.

The underground rock laboratory lies beneath the Juchlistock. Image: DesAir

  1. Grimsel Test Site
  2. Lake Räterichsboden
  3. Lake Grimsel
  4. Juchlistock
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