The Sea of Ice and the Montenvers train from Megève
Half an hour's drive from Megève, the Chamonix valley is home to one of the most fascinating natural sites in the French Alps: the Mer de Glace. Accessible by the famous Montenvers train, this ancient glacier offers an excursion that is both spectacular and meaningful, particularly moving at the beginning of spring, when the low light reveals the full extent of the contrasts between rock, ice, and sky.
The Mer de Glace, France's largest glacier
The Mer de Glace is a valley glacier located on the northern slope of the Mont Blanc massif, in Haute-Savoie. It results from the confluence of the Tacul Glacier and Leschaux Glacier, and extends for seven kilometres in length, with a catchment basin covering an area of 40 km².
Its evocative name was given to it in the 18th century: its crevasses at the time recalled the appearance of icy breakers, like the waves of a frozen sea. This site has fascinated the greatest minds in history. Victor Hugo (1825), Alexandre Dumas (1832), Charles Dickens (1846) and Louis Pasteur (1860) all made the journey to Montenvers to contemplate this exceptional panorama.
Today, Nearly a million visitors head to Montenvers every year. to contemplate the Mer de Glace. This is to say that the experience, a century and a half later, remains of undiminished power.
The Montenvers train for a century-old mountain journey
Access to the site is via the Montenvers train, a rack railway that departs from Chamonix and whose history dates back to the early 20th century. The construction of this rack railway line, launched in 1906, led to its inauguration in 1908.
The journey aboard this little red cogwheel train takes travellers from Chamonix to the Montenvers site, at an altitude of 1,913 metres, in 20 minutes, through a spectacular route offering superb panoramas of the valley and the Aiguilles Rouges massif. Upon arrival, the panorama is striking: The Dru and the Grandes Jorasses stand as a backdrop, mythical summits of world mountaineering.
This is an authentic way to approach the mountain – no cables, no express chairlifts, but a convoy that takes its time climbing the slope, allowing the eyes to adjust to the verticality of the landscape.
The on-site visit: ice cave, Glaciorium and panoramas
Once at Montenvers, the visit is structured around several complementary stages.
The Ice Cave
A new cable car takes visitors deep into the mountains and up to the Ice Grotto: A magical gallery, carved by man within the glacier itself. The Ice Grotto, re-sculpted each year to follow the glacier's natural movement, has showcased ephemeral sculptures and an unusual path since the 1940s. It is advisable to forecast shoes with good grip and warm clothing, the temperature remaining low regardless of the season.
The Glaciorium
The Glaciorium is an interactive space dedicated to glaciology and the history of the Mer de Glace. remarkable museum benefits from decades of work carried out by the teams at the Glaciology and Environmental Geophysics Laboratory in Grenoble, which has led to the accumulation of precise data on Alpine glaciers. It should be noted that a new climate and glacier interpretation centre is set to open in 2026, with interactive exhibitions charting the evolution of glaciers and our relationship with them.
Recommended visit duration
It is appropriate to foresee 2 to 3 hours for the full tour, including travel and the cave.. On-site, the restaurant at the Montenvers refuge offers Savoyard cuisine.
A glacier in the face of climate change
A visit to the Mer de Glace cannot ignore what it reveals with striking clarity: the progressive retreat of an ice age world under the effect of global warming.
Since 1850, the Mer de Glace has retreated by nearly three kilometres, with an annual retreat of 30 to 40 metres in recent years, revealing bare landscapes, marked by moraines and rocky debris. The signs along the path indicate the Successive historical positions of the glacier, making tangible what figures alone fail to convey. Sometimes “seeing is believing”!
According to measurements taken by research teams, the Mer de Glace has retreated by 1.7 km between 1890 and 2024, losing between 15 and 20 metres per year at its front. This finding is transforming the visit: What we have come to see is no longer just a grand spectacle, but direct testimony of a transformation under way.
Here's some practical information for organising your day from Megève: Getting around: * **Car:** If you have a car, it's the most flexible option for exploring the surrounding areas. Parking can be found in Megève itself and in nearby villages. * **Bus:** There are local bus services connecting Megève to neighbouring towns and villages. Timetables can usually be found at the tourist office or online. * **Taxi/VTC:** Taxis and private hire vehicles are available for hire. Attractions and activities: * **Within Megève:** Enjoy the charming village centre, browse the shops, visit the Église Saint-Jean-Baptiste, and perhaps take a stroll to the sports centre. * **Nearby villages:** Explore the picturesque villages like Combloux (known for its lake and views of Mont Blanc), Cordon (a traditional Savoyard village), or Praz-sur-Arly (for paragliding and its charming market). * **Nature and hiking:** Depending on the season, there are numerous hiking trails for all levels. Consider the paths around the Mont d'Arbois or towards the Aiguille Croche for breathtaking views. * **Lake Passy:** A beautiful artificial lake offering opportunities for walking, picnicking, and water sports (in summer). It's a short drive from Megève. * **Chamonix:** For a more extensive day trip, Chamonix is about 45 minutes to an hour's drive away. You can take the Aiguille du Midi cable car for spectacular mountain vistas or explore the town. Food and drink: * **Restaurants in Megève:** You'll find a wide range of dining options, from traditional Savoyard cuisine to more international fare. * **Picnic:** Consider packing a picnic to enjoy amidst the stunning mountain scenery. Local bakeries and markets are great for stocking up. Tips for your day: * **Check the weather:** Mountain weather can change quickly. Always check the forecast before heading out. * **Wear appropriate clothing and footwear:** Even for a short walk, comfortable shoes are essential. Layers are recommended for varying temperatures. * **Carry water and snacks:** Stay hydrated and fuelled, especially if you're planning outdoor activities. * **Tourist Office:** The Megève tourist office is an excellent resource for maps, brochures, local advice, and up-to-date information on events and transport.
The road distance between Megève and Chamonix is approximately 34 kilometres, with an estimated journey time of 45-50 minutes by car. The road is pleasant in spring, running alongside the villages of the Arve valley. It is advisable to leave in the morning to avoid crowds on the site, which can be significant at weekends, during school holidays and especially on fine days.
Montenvers Train Timetable (Spring 2026)
From 14 March to 30 April 2026, the site is open daily from 10:00 to 17:00. First departure: 10:00. Last ascent: 16:30. Last descent: 17:00. Trains run hourly, or every 30 or 20 minutes depending on visitor numbers. Last recommended departure from Chamonix to visit the ice cave: 3:00 PM. Cable car and cave open during this period. More information here.
Please note: an annual closure is scheduled from 18 to 22 May 2026 inclusive.
Indicative prices (Winter season 2025/2026)
| Package | Adult | Young (5-14 years) / Senior (65+) |
|---|---|---|
| Return train only | 31,50 € | 26,80 € |
| Sea of Ice Travel Package (Return train + cable car + ice cave + exhibitions) | 49,70 € | 42,20 € |
| Family Package (Mer de Glace Trip) | €148.30 (2 adults + 2 children) | — |
| Child under 5 | Free | — |
Additional child in family package: €12.40. Group rates available on request.
Tips for your visit
A few points are worth noting before you leave:
- Booking tickets online is strongly recommended at weekends and during school holidays, as seats sell out quickly on days with good weather.
- Pack warm clothing, including in springtime: the temperature inside the cave remains low and the humidity constant.
- Wear walking shoes with good grip for descending and ascending the steps leading to the glacier.
- Allow plenty of time: the visit is not a quick one, and that is precisely what makes it valuable.
An exceptional day departing from your chalet in Megève
The excursion to the Mer de Glace fits naturally into a stay in Megève, at the cusp between winter and spring. After a relaxing morning at the chalet – indoor pool, sauna or massage – the drive to Chamonix opens up another dimension of the Alps: more mineral, more vertiginous, carried by a sense of immensity and, today, of urgency.
It is an excursion that leaves a lasting impression and lends a particular depth to a mountain stay.
FAQ
Is the Mer de Glace accessible in spring? Yes. From 14 March to 30 April 2026, the site is open daily from 10 am to 5 pm. Spring offers exceptional light and often more serene visiting conditions than during the peak summer season.
Is it necessary to book the train in advance? Online booking is highly recommended on weekends and public holidays. Tickets purchased online are valid exclusively for the excursion date selected at the time of purchase.
How long does the full tour take? Allow for 2 to 3 hours for the full visit, including travel and the cave. Therefore, half a day is sufficient to fully enjoy the site.
What is the distance between Megève and Chamonix? The road distance is approximately 34 kilometres, for a journey of about 45 to 50 minutes by car.
Is the visit suitable for children? Absolutely. The ice cave and the Glaciorium are very popular with younger visitors. However, it's worth noting that access to the cave requires descending and ascending several hundred steps, which assumes a reasonable level of physical fitness.