Report — The Montenvers train and the Mer de Glace glacier, in Chamonix
There are short trips that are worth the longest getaways. The ascent to Montenvers, aboard a century-old cog railway that departs from Chamonix to gain 871 meters in elevation in twenty minutes, is one of them. Upon arrival, the Mer de Glace glacier stretches out below, seven kilometers of mineral white encircled by the Drus, the Grandes Jorasses, and the peaks of Mont Ventoux. It is the longest ice river in France; it is also one of the most telling barometers of the European climate.
A little red train, opened in 1908, which continues to impress.
The Montenvers railway was inaugurated on August 29, 1908, at the height of the great Alpine railway construction projects. Five kilometers of track, gradients reaching 22%, a Strub-type rack system laid meter by meter into the rock: the structure has remained virtually unchanged for over a century. The red trains, modernized in the 1980s and recently re-equipped, still travel the original route in twenty minutes, at a leisurely pace that allows time to take in the changing vegetation. The journey begins in the meadow, passes through the spruce and larch forest, and suddenly emerges overlooking the glacier at 1,913 meters. The transition is striking.
Of note for heritage enthusiasts: a historic steam-powered carriage, preserved for special occasions, still makes a few appearances each year for commemorative journeys — information can be found on the website of the Mont Blanc Company, operator of the line.
The Mer de Glace: seven kilometers of living ice
From the panoramic terrace of Montenvers, one can take in the entire glacier. Its longitudinal ridges, which are called medial morainesThese features betray the merging of several glacier tongues—those of the Tacul, Leschaux, and Talèfre—converging into a single, motionless river. The flow gradient is gentle (averaging 90 meters per year in the central section), enough to produce this landscape of seracs and blue crevasses that has fascinated people since the 19th century. It was here that Goethe came to meditate in 1779; here that Mary Shelley set the encounter between Frankenstein and his creature; here that European high-altitude tourism was born around 1860.
The glacier is currently losing about four meters of thickness per year. Signs along the stairs leading down to the cave indicate the surface altitude in 1990, 2000, 2010, and 2020—a factual, understated detail that conveys the march of climate change better than any speech. The visit, therefore, has become as much a scientific experience as an aesthetic one.
The cable car and the ice cave: descending into the glacier
Since 2024, a new Mer de Glace cable car It replaces the old installation and leads directly, without transfers, to the current base of the glacier. The cabin glides over the moraines and reveals the depth of the glacial furrow—a landscape of polished stones, torrents of meltwater, and, below, the tongue of ice itself. Upon arrival, a staircase of approximately 580 steps (and its number increases year by year, following the retreat of the glacier) descends to the entrance of the cave.
Sculpted with a chainsaw and hot blade each spring by a team of professional glacier sculptors — a task started anew each season, since the glacier deforms and erases it in the processspathis of a few months —, the ice cave The exhibit offers a roughly 100-meter journey through a series of chambers carved into the heart of the glacier. Lounges bathed in deep blue light, tables and thrones made of ice, scenes inspired by the history of Montenvers: the staging never obscures the raw material. Here, you touch the glacier, hear its creaks, and grasp the immensity of a living, breathing entity. The interior temperature remains constant at around -2°C, and non-slip footwear is strongly recommended.
The Glaciorium and the panorama: understanding what we are looking at
Just steps from the train's arrival station, the Glaciorium This is a small, modern museum dedicated to alpine glaciology. Animated models, projections, photographic archives, and scientific accounts trace the formation, movement, and evolution of the Mer de Glace glacier. It's not crowded, the visit is fairly quick (40 minutes is enough), and probably the best way to transform a scenic walk into an informative experience. Recommended at the beginning of the route, before descending to the ice cave.
In front of the building, the panoramic terrace It allows you to take in at a single glance the Drus (3,754 m, directly ahead), the Grandes Jorasses (4,208 m, in the background) and the Géant peak. It is one of the most accessible viewpoints in the Mont Blanc massif — no need to put on crampons to stand there.
Booking and prices: the right ticket for your itinerary
Ticketing is handled through the Mont Blanc Company, historical operator: montblancnaturalresort.comOnline booking is strongly recommended in July, August and during school holidays — the Montenvers station, in Chamonix centre (319 place de la Mer de Glace), can experience significant queues in the mid-morning.
Several formulas coexist. The Sea of Ice Pack (€49,70 adult) remains the most comprehensive and highly recommended option: it includes the round-trip train, cable car, ice cave, and Glaciorium. Hikers wishing to ascend via the Grand Balcon Nord trail and descend by train should opt for a single ticket; mountaineers or enthusiasts heading to the Couvercle Refuge use the Mountaineer Pack. Full details are provided in the table below.
A stop at the Refuge du Montenvers: the grand mountain hotel
It's hard to imagine a more unique setting for lunch. The Grand Hotel du MontenversOpened in 1880 and renovated without losing any of its charm, it still serves travelers alongside hikers descending from the Grand Balcon trail. refuge restaurant offers classic Savoyard cuisine — tartiflette, fondue, daily specials — in a wood-paneled room with windows overlooking the ice cream parlor. Next door, the Glacier Bar It allows for a quicker stop for a snack, hot chocolate, or a drink with a view of the Drus. Reservations are recommended for summer lunch at the restaurant.
From the Hotel Jeu de Paume
Montenvers train station, in the centre of Chamonix, is a 10-minute drive from theHotel Jeu de Paume to Les Praz-de-Chamonix. For travelers without a vehicle, the Mont-Blanc Express The shuttle bus directly serves Chamonix Centre from the Les Tines stop, 200 meters from the hotel — a free journey with the Guest Card provided upon arrival. The concierge will gladly arrange ticket reservations and can advise on the best time slot depending on the weather. See all activities offered by the hotel facing the Mont Blanc massif.
2026 fares and timetables for the Montenvers train
| Flat rate | Included | Adult | Children 5-14 / Seniors | Family (2A+2E) |
|---|---|---|---|---|
| Sea of Ice Pack (recommended) | Train + cable car + cave + Glaciorium | 49,70 € | 42,20 € | 154 € |
| Return train + cable car | Without a cave | 41,10 € | ||
| Train AR only | Panorama only | 31,50 € | ||
| Mountaineer Pack | Train + refuge access | 42,30 € | ||
| Hiking Package (Summer 2026) | Train + great trails | 42 € |
Timetable 2026: May 23 – July 3: 8:30 am – 5 pm; July 4 – August 30: 8 am – 17:30 pm (high season); August 31 – September 13: 8:30 am – 17 pm; September 14 – November 1: 8:30 am – 17:30 pm. Annual technical closures: train from May 18 to 22; cable car from May 11 to 29; ice cave from May 11 to June 16 (sculpting of the new cave).
F.A.Q
How much does a day at the Mer de Glace cost in 2026?
The complete Mer de Glace package (train + cable car + ice cave + Glaciorium) costs €49,70 per adult and €42,20 for children aged 5 to 14 or seniors over 65. The family package for 2 adults and 2 children is €154. Booking and full price list are available on the Compagnie du Mont-Blanc website (montblancnaturalresort.com).
Do you need to book the Montenvers train in advance?
Online booking is strongly recommended during peak season (July, August, school holidays) on the Compagnie du Mont-Blanc website. This avoids the sometimes long queues at the Montenvers station, located at 319 Place de la Mer de Glace in Chamonix town centre.
How much time should I allow to visit the Mer de Glace?
Allow 2.5 to 3 hours to fully enjoy everything: a 20-minute train ride up, a cable car descent, a visit to the ice cave, a visit to the Glaciorium, a panoramic terrace, lunch on site, and then the return trip. A full half-day is a comfortable amount of time to avoid rushing.
Is the ice cave open all year round?
No. The cave is sculpted anew each spring and closed for this annual work from May 11 to June 5, 2026. It remains accessible throughout the rest of the tourist season, until the site closes in early November.
How many steps are there to reach the ice cave?
Approximately 580 steps lead down to the cave (and the same number back up), in addition to the cable car ride. The number of steps increases each year due to the glacier's retreat (about 4 meters of thickness lost annually). Not recommended for people with reduced mobility or heart conditions.
Is it possible to hike up to Montenvers from Chamonix?
Yes. The Montenvers trail from Chamonix gains 870 meters of elevation over approximately 5 kilometers, taking 2.5 to 3 hours for a fit hiker. It's one of the valley's classic hikes. Many hikers ascend on foot and descend by train (or vice versa); a single ticket is then sufficient. It can also be combined with the Grand Balcon Nord trail, which leads to the Plan de l'Aiguille.
How far is Montenvers from the Hotel? Jeu de Paume ?
The Montenvers train station in Chamonix town centre is a 10-minute drive from the hotel. Jeu de Paume in Praz-de-Chamonix, facing the Mont Blanc massif. The Mont-Blanc Express train also goes there from the Les Tines stop (200 m from the hotel, free with the Guest Card).
