The Glaciorium | Witness to climate change

Information Montenvers train :CLOSURE on Friday April 18th 2025

Due to heavy snowfall: trees on the track have damaged the line:

As a result: the Montenvers area will be closed on Saturday, April 19th 2025.

Please note: the PIDA Montenvers could not be carried out today due to access conditions to the site and trees on the track which prevented the train from taking our teams up.

We remind you that the site will be closed for work and maintenance from 12 to 23 May 2025.

(Grotte de Glace closed from 12 to 30 May 2025 inclusive).

For any information regarding the Montenvers train, please contact the Montenvers Departmental Authority at 04.65.60.00.80 or accueil@montenverstrain.com

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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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