The Glaciorium | Witness to climate change

Information Montenvers Mer de glace

Opening of the Mer de Glace gondola lift, the Temple of Nature and the Glaciorium on All Saints' Day from 18/10 to 2/11 included.

A glaciologist will be on hand from 10 a.m. to 4 p.m. every day during this period to read the landscape and provide information on the Mer de Glace.

The Grotte de Glace is currently closed.

For information about the train : Tel : 04 65 60 00 80 and Email : accueil@montenverstrain.com

Season & Annual passes

Take advantage of the best rates on Season & Annual passes, from 20 October to 30 November 2025 !

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A space on glaciers

The Montenvers - Mer de Glace site is a true witness to the climate changes of our century, and deserved a space dedicated to glaciology!

The Mer de Glace
Its formation
Its history
Its future evolution...

This is what you can find out when you visit this interactive and educational site...

As part of the renovation program for the listed Montenvers site (new Public Service Delegation contract signed with the Municipality of Chamonix), we are pleased to inform you that major work has begun on the Montenvers site and will be spread over the next three years. Here are the main stages of the project

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The famous little red train takes passengers from Chamonix (1035 m) to the Montenvers station (1913 m) in 20 minutes. On arrival, the view of the Mer de Glace is breathtaking, bearing witness to the effects of climate change.

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