Lac Blanc
About
Lac Blanc, located in the heart of the Chamonix Valley, is a mountaintop jewel that offers hikers a breathtaking panorama of the Mont Blanc chain. The trail can be approached from either the Col des Montets or the Tré-le‑Champ, each route presenting a slightly different character. The Col des Montets path is more gentle, avoiding exposed ladders and giving way to a lush forest before reaching the lake, while the Tré‑le‑Champ route is more a thrilling, technical climb that includes a series of wooden ladders (échelles) and a descent down the Aiguillette d’Argentière. The ascent typically takes around 2 h 45 min, and depending on your chosen route, the descent ranges from 1 h 30 min to 2 h. The overall round trip therefore occupies roughly 4 h 45 min of adventurous exploration, making it suitable for well‑prepared day hikers who can handle some challenging terrain. Along the way, the trail showcases stunning alpine scenery: the turquoise waters of Lac Blanc itself, the iconic Aiguillette d’Argentière, the spectacular Aiguille Verte, and the quieter Lac des Chéserys – a lovely side basin that offers a perfect spot to pause and soak in the view. The best time to tackle this hike is early June to late July, when the snow has melted enough to open the paths, but before the peak summer crowds arrive. In spring, the trail spends many days atop fresh snow, while the later summer months bring warmer temperatures and a lighter trail. Early autumn can still be accessible but is less predictable due to potential snowfall. Because the trail is classified as “hard,” it is recommended for experienced hikers who are comfortable with steep ascents and some exposure. Those who thrive on a mix of forest, alpine rock, and panoramic vistas will find Lac Blanc a rewarding challenge. For safety, it is advised to start early and bring a map of the mountain, suitable gear, and sufficient water. The trail is open year‑round, but access to the Col des Montets was temporarily closed after summer for safety work; please check with local authorities or the Chamonix tourism office for the latest trail status before setting out.
Highlights
- Stunning Mont Blanc Panorama
- Aiguillette d’Argentière
- Lac Blanc
- Aiguille Verte
- Lac des Chéserys
Must-See Areas
Good to Know
Good for
Best time to visit
Early June to late July offers the best combination of clear trails and stunning alpine vistas before the late‑summer crowds.
At a glance
- Typical visit: about 4 hours 45 minutes