How to Hike to the Mlzet Lake

The Mlzet Lake, nestled in the remote and breathtaking Hautes-Alpes region of southeastern France, is one of the most stunning alpine destinations in the French Alps. Surrounded by jagged peaks, wildflower-strewn meadows, and crystalline waters that reflect the sky like a mirror, this high-altitude lake offers hikers an unforgettable experience that blends natural beauty with physical challenge. While not as widely known as nearby lakes such as Lac dAllos or Lac de Serre-Ponon, Mlzet Lake remains a hidden gem cherished by serious trekkers and nature purists. Reaching it requires careful planning, physical preparation, and respect for alpine environments making the journey as rewarding as the destination itself.

This guide provides a comprehensive, step-by-step walkthrough for safely and successfully hiking to Mlzet Lake. Whether youre a seasoned mountaineer or an ambitious beginner with solid hiking experience, this tutorial equips you with the knowledge, tools, and best practices needed to navigate the trail, understand the terrain, and appreciate the ecological and cultural significance of this remote alpine sanctuary. By the end of this guide, youll know exactly how to prepare, what to expect, and how to minimize your impact while maximizing your experience.

Step-by-Step Guide

1. Research the Location and Trailhead

Before setting foot on the trail, you must identify the correct starting point. Mlzet Lake (Lac de Mlzet) is located at approximately 2,450 meters (8,040 feet) above sea level in the Parc Naturel Rgional des crins. The most common and well-maintained access route begins at the Col de la Bonette the highest paved road in Europe which sits at 2,802 meters. However, the most practical and popular trailhead for day hikers is the Chalet de la Mlzet, located at 2,250 meters, just off the D902 road between the villages of Saint-tienne-en-Dvoluy and La Faurie.

To reach the trailhead, drive from Brianon (the nearest major town, about 35 km away) along the D902. From the village of Saint-tienne-en-Dvoluy, follow signs toward Lac de Mlzet and Chalet de la Mlzet. The final 2 km of road are unpaved and narrow, so a vehicle with decent ground clearance is recommended. Parking is available at the chalet, but spaces are limited arrive early, especially during peak season (July to September).

2. Assess Your Fitness and Acclimatization

Hiking to Mlzet Lake is not a casual stroll. The trail involves an elevation gain of approximately 200 meters over 3.5 kilometers (one way), with steep, rocky sections and uneven terrain. The altitude alone can cause fatigue, shortness of breath, or mild altitude sickness in unacclimatized individuals. If youre coming from low elevation (below 1,000 meters), spend at least one night in Brianon or Saint-tienne-en-Dvoluy to begin acclimatizing.

Physical preparation should include:

• Cardiovascular endurance: Regular brisk walking, hiking, or stair climbing for 46 weeks prior.
• Leg strength: Squats, lunges, and hill workouts.
• Balance and stability: Practice walking on uneven surfaces or using a balance board.

Its also wise to test your gear on a similar trail such as the hike to Lac de lArgentire to ensure your boots, backpack, and clothing perform well under alpine conditions.

3. Choose the Right Season and Weather Window

The hiking season for Mlzet Lake typically runs from late June to mid-September. Outside this window, snow can persist on the trail, making passage dangerous or impossible. Even in peak season, weather in the high Alps is volatile. Temperatures can drop below 5C (41F) at the lake, even on sunny days.

Check the Mto-France forecast for the Hautes-Alpes region 48 hours before your hike. Avoid days with thunderstorm warnings, high winds, or heavy cloud cover alpine storms can develop rapidly and leave you exposed on ridgelines. Early morning starts are ideal: youll avoid afternoon thunderstorms and enjoy the clearest views before clouds roll in.

4. Begin the Hike from Chalet de la Mlzet

Start at the Chalet de la Mlzet parking area. Look for the clearly marked trailhead sign: Lac de Mlzet 3.5 km. The initial 500 meters follow a gentle, well-graded path through alpine pastureland dotted with grazing cows and wildflowers like edelweiss and gentian. This section is ideal for warming up and adjusting your pace.

At approximately 1.2 km, the trail begins to climb more steeply. Youll pass a small stone shelter and a stream crossing marked by wooden planks. Continue following the cairns (rock piles) and red-and-white trail markers. The terrain becomes rocky and scree-covered, so secure footwear with ankle support is essential. Take frequent breaks especially at the 2 km mark to hydrate and check your elevation using a GPS app or altimeter watch.

5. Navigate the Final Ascent to the Lake

The last 1.5 km is the most demanding. The trail narrows, and youll ascend over a series of switchbacks carved into the mountainside. The air grows thinner, and the views open dramatically: the jagged peaks of the crins massif rise to the north, and the valley below reveals a patchwork of green meadows and glacial valleys.

At around 3.2 km, youll reach a flat ridge with a panoramic view of the lake. The final 300 meters descend gently over loose scree be cautious, as rocks can shift underfoot. The lake emerges suddenly: a deep blue oval ringed by wild grasses, scattered boulders, and snowmelt-fed streams feeding into its shores. The water is so clear you can see the pebbles on the lakebed more than a meter down.

6. Explore and Respect the Lake Environment

Once at the lake, take time to rest, hydrate, and enjoy the silence. This is not a swimming destination the water is glacial and dangerously cold, even in summer. Do not enter the water or disturb the fragile alpine flora surrounding the shoreline. The area is protected under regional conservation laws, and littering, campfires, or off-trail hiking are strictly prohibited.

Many hikers choose to sit on the southern shore, where the sun lingers longest, and enjoy a packed lunch. Bring a lightweight mat or towel to sit on the ground is damp and uneven. Photographs are encouraged, but avoid using drones they are banned in French national parks without special permits.

7. Descend Safely and Return to Your Vehicle

Descending can be more treacherous than ascending. Fatigue increases the risk of slips and falls on scree. Use trekking poles if you have them. Maintain a slow, controlled pace. If you feel dizzy, nauseous, or unusually tired, stop immediately. Altitude sickness can strike even on moderate hikes descend if symptoms persist.

Return the same way you came. Do not attempt shortcuts or unmarked trails they lead to unstable terrain and can result in injury or getting lost. Upon reaching the chalet, check your gear for mud or debris. Clean your boots before returning to your vehicle to prevent the spread of invasive plant seeds.

Best Practices

1. Leave No Trace Principles

The Mlzet Lake region is part of a protected natural park. Its ecosystem is delicate and slow to recover from human impact. Follow the seven Leave No Trace principles rigorously:

• Plan ahead and prepare. Know the weather, trail conditions, and regulations.
• Travel and camp on durable surfaces. Stay on marked trails. Avoid trampling moss or alpine flowers.
• Dispose of waste properly. Pack out all trash including food wrappers, tissues, and biodegradable peels.
• Leave what you find. Do not pick flowers, move rocks, or carve into trees.
• Minimize campfire impact. Fires are prohibited. Use a portable stove if cooking.
• Respect wildlife. Observe animals from a distance. Do not feed them.
• Be considerate of other visitors. Keep noise low. Yield to uphill hikers.

2. Hydration and Nutrition

At high altitudes, your body loses fluids faster due to increased respiration and dry air. Carry at least 2 liters of water per person, even if the trail appears short. A hydration bladder is more convenient than bottles. Consider adding electrolyte tablets to prevent cramping.

For nutrition, pack high-energy snacks: nuts, dried fruit, dark chocolate, energy bars, and sandwiches with lean protein. Avoid heavy, greasy meals before or during the hike they slow digestion and increase fatigue. Eat small portions every 4560 minutes to maintain steady energy.

3. Clothing and Layering System

Alpine weather changes rapidly. Dress in three layers:

• Base layer: Moisture-wicking synthetic or merino wool top and leggings.
• Insulating layer: Lightweight fleece or down jacket.
• Outer shell: Windproof and waterproof hardshell jacket with hood.

Wear long hiking pants they protect against scratches from brush and sunburn. A wide-brimmed hat and UV-blocking sunglasses are essential. Even on cloudy days, UV radiation is intense at altitude.

Footwear: Sturdy, broken-in hiking boots with Vibram soles and ankle support. No trail runners the scree and rocks are too hazardous.

4. Navigation and Emergency Preparedness

Cell service is unreliable or nonexistent along the trail. Do not rely on your phone for navigation. Download offline maps using Gaia GPS or OSMAnd before you leave. Print a paper map from the Parc des crins website as backup.

Carry a basic first aid kit with: adhesive bandages, antiseptic wipes, blister treatment, pain relievers, tweezers, and a small emergency blanket. Also pack a whistle, headlamp with extra batteries, and a lightweight emergency shelter (like a bivy sack).

Inform someone of your itinerary your planned route, start time, and expected return time. If you dont check in by 7 PM, they should alert local authorities.

5. Timing and Pacing

Most hikers complete the round-trip in 4 to 5 hours, including rest and photo stops. Start no later than 8:00 AM to allow ample time for descent before afternoon storms. Hiking too late increases the risk of being caught on exposed ridges after dark.

Use the talk test to gauge your pace: if you can speak in full sentences without gasping, youre going at a sustainable speed. If youre breathless, slow down. Pushing too hard at altitude leads to exhaustion and poor decision-making.

Tools and Resources

1. Recommended Maps and Apps

• IGN Top 25 3437 OT Les crins The official French topographic map. Available in print or via the IGN Geoportail app.
• Gaia GPS Offers offline maps, GPS tracking, and trail overlays. Subscribe to the French topographic layer for detailed contour lines.
• OSMAnd Free open-source app with offline OpenStreetMap data. Excellent for route recording.
• Windy.com Real-time wind, precipitation, and temperature forecasts for mountain regions.

2. Essential Gear Checklist

Before departure, verify you have:

• Sturdy hiking boots (broken in)
• Moisture-wicking base layers (top and bottom)
• Insulating mid-layer (fleece or down)
• Waterproof and windproof shell jacket
• Hiking pants (convertible preferred)
• Wool or synthetic socks (2 pairs)
• Wide-brimmed hat and UV-blocking sunglasses
• High-SPF sunscreen and lip balm
• 23 liters of water + electrolyte tablets
• High-energy snacks (nuts, bars, dried fruit)
• Lightweight backpack (2030L capacity)
• Trekking poles (highly recommended)
• Headlamp with extra batteries
• Whistle and emergency blanket
• Basic first aid kit
• Mobile phone (fully charged, offline maps downloaded)
• Power bank (optional, for long trips)
• Small trash bag (for all waste)
• Camera or smartphone for photos

3. Official Resources and Contacts

For up-to-date trail conditions, closures, or weather alerts, consult:

• Parc Naturel Rgional des crins www.ecrins-parcnational.fr (French only, but maps and alerts are visual)
• Mto-France Hautes-Alpes www.meteofrance.com
• Office de Tourisme de Brianon Provides printed trail guides and local advice

Do not rely on third-party blogs or social media for trail conditions. Always cross-reference with official sources.

4. Alternative Routes and Extensions

If you have extra time and fitness, consider extending your hike:

• Mlzet to Lac de la Plagne (via Col de la Croix) Adds 5 km and 400 meters of elevation. Offers a loop with panoramic views.
• Connexion to Lac de lArgentire A longer, more technical route requiring route-finding skills and possibly crampons in early season.
• Overnight at Refuge de la Mlzet A basic mountain hut (open JulyAugust) with dormitory-style lodging. Book in advance via the FFCAM (French Alpine Club).

These extensions are for experienced hikers only. Stick to the main trail if youre unsure of your ability.

Real Examples

Example 1: Sarah and Marc First-Time Alpine Hikers

Sarah and Marc, both 32, live in Lyon and had only hiked lowland trails before deciding to tackle Mlzet Lake. They trained for six weeks with weekly hill walks and stair climbing. They drove to Saint-tienne-en-Dvoluy the night before, slept at a gte, and started at 7:30 AM. They carried 2.5 liters of water, energy bars, and a small first aid kit.

They encountered a sudden rain shower at 2.8 km and used their rain shells without panic. They took a 20-minute break under a rocky overhang, ate a snack, and continued. At the lake, they spent 45 minutes photographing the reflections and eating a sandwich. They descended by 2:00 PM, well before clouds gathered.

We thought it would be harder, Sarah said. But the trail was well marked, and the views were worth every step. We didnt see another person for 20 minutes that silence was magical.

Example 2: Jean-Luc Solo Hiker and Photographer

Jean-Luc, a 58-year-old retired engineer from Grenoble, hikes Mlzet Lake every August. He carries a DSLR camera, a lightweight tripod, and a portable solar charger. He starts at dawn, spends three hours at the lake capturing light on the water, and descends by noon.

The lake changes with the light, he explains. At sunrise, its silver. At midday, its turquoise. At sunset, it turns into liquid gold. You have to be there when the light is right.

Jean-Luc always carries a small notebook to log weather, cloud cover, and water clarity. He shares his photos and notes on a private blog used by other photographers to plan shoots. He never posts exact locations on social media to prevent overcrowding.

Example 3: The Group That Ignored Warnings

In July 2022, a group of six hikers from Marseille ignored the Mto-France thunderstorm alert and started at 1:00 PM. Within an hour, dark clouds rolled in. Lightning struck a ridge 500 meters from their path. One hiker suffered minor burns from a nearby strike. The group became disoriented in the fog and spent two hours wandering before being located by a park ranger.

They were rescued safely, but the incident led to stricter enforcement of trailhead warnings and the installation of new signage. We thought wed be fine, one member later admitted. We didnt realize how fast storms move up here.

This example underscores why checking the forecast and starting early are non-negotiable.

FAQs

Is the hike to Mlzet Lake suitable for children?

Children aged 10 and older with prior hiking experience can manage the trail if accompanied by adults. The path is not technically difficult, but the altitude and uneven terrain require steady footing. Younger children may struggle with the elevation gain and long duration. Consider bringing a child carrier for toddlers.

Can I swim in Mlzet Lake?

Swimming is technically possible but strongly discouraged. The water temperature rarely exceeds 8C (46F), even in peak summer. Hypothermia can set in within minutes. There are no lifeguards, and the lake has no safe entry/exit points. Respect the environment and the rules of the national park.

Are dogs allowed on the trail?

Dogs are permitted but must be kept on a leash at all times. They can disturb wildlife, especially marmots and chamois, and may damage fragile vegetation. Clean up after your pet waste is not biodegradable at this altitude.

Is there drinking water on the trail?

No. All water sources are glacial runoff and must be filtered or treated before consumption. Even if the water looks clear, it may contain giardia or other pathogens. Bring all the water you need.

What is the best time of day to visit Mlzet Lake?

Early morning (7:009:00 AM) offers the calmest conditions, clearest skies, and the best light for photography. Afternoon (1:004:00 PM) often brings clouds and thunderstorms. Sunset is beautiful but risky descending in fading light increases danger.

Do I need a permit to hike to Mlzet Lake?

No permit is required for day hiking. However, if you plan to camp overnight at Refuge de la Mlzet or any other alpine hut, reservations are mandatory and must be made weeks in advance.

How crowded is the trail?

Weekends in July and August see moderate traffic perhaps 1530 people on the trail at once. Weekdays and early June/late September are quiet. If you seek solitude, avoid public holidays and school breaks.

Can I visit Mlzet Lake in early June or late September?

Possibly, but conditions vary. Snow can linger on the trail until mid-June. In September, temperatures drop rapidly after 5 PM, and some huts close. Check with the Parc des crins for current snowpack reports before attempting the hike outside peak season.

What wildlife might I encounter?

You may see marmots (often whistling from rocks), chamois (grazing on slopes), and alpine birds like the wallcreeper or golden eagle. Do not approach or feed any animals. Keep food sealed marmots are bold and will steal snacks.

Is there cell service at the lake?

No. The nearest signal is at the Col de la Bonette, over 5 km away. Download offline maps and inform someone of your plans before leaving.

Conclusion

Hiking to Mlzet Lake is more than a physical journey its a pilgrimage into one of the most pristine alpine landscapes in Europe. The trail demands preparation, respect, and mindfulness, but the reward is a moment of pure, unspoiled nature that few ever witness. The lake doesnt just reflect the sky; it reflects the quietude of the mountains, the resilience of the earth, and the humility of the human spirit.

By following the steps outlined in this guide from route planning and gear selection to weather awareness and Leave No Trace ethics you ensure not only your own safety but the preservation of this fragile ecosystem for generations to come. This is not a destination to conquer; its a sanctuary to honor.

As you stand at the waters edge, listening to the wind ripple across the surface and watching the clouds drift over the crins peaks, remember: you are not just a visitor here. You are a temporary guest in a world that has existed long before you and will endure long after. Tread lightly. Breathe deeply. And carry the peace of Mlzet Lake with you, long after youve returned to the valley below.