Lacs des Chéserys and Lac Blanc Loop

A popular starting point for this loop is from the Flégère gondola station. You can reach Flégère by public transport from Chamonix or by car. Parking is available at the Flégère lift station, though it can fill up quickly during peak season. Another option is to start from Col des Montets, which also offers parking.

The terrain on this loop is generally rugged and rocky, requiring technical footing. You can expect narrow paths, steep ascents and descents, and potentially loose scree. Some sections, particularly between Lac Blanc and Lacs des Chéserys, may even have metal ladders. Proper trail running shoes with excellent grip are essential due to the challenging nature of the trail.

The best time to jog this loop is typically from late June to early October. During the shoulder seasons (spring and late autumn), lingering snowfields can be present, especially on higher and less frequented paths, making the route more challenging and potentially hazardous. Summer offers the most reliable conditions and access.

As this trail is located within the Réserve Naturelle des Aiguilles Rouges, dogs are generally not permitted, even on a leash, to protect the local wildlife and environment. It's always best to check the latest regulations with the local tourist office or park authorities before planning your visit with a dog.

There are no specific permits or entrance fees required to access the Réserve Naturelle des Aiguilles Rouges for day use. However, visitors are expected to respect the reserve's regulations, which include staying on marked trails, not disturbing wildlife, and taking all litter with them.

This loop offers continuous panoramic views of the Mont Blanc massif. Key highlights include the stunning turquoise waters of Lac Blanc, often called the most beautiful lake in France, and the equally picturesque Lacs des Chéserys. You'll also pass by the La Flégère Refuge and the Tête aux Vents summit, both offering incredible vistas. Keep an eye out for wildlife like Alpine Ibexes.

Yes, this route shares sections with several other well-known trails. You'll find yourself on parts of the Tour du Mont Blanc - Itinéraire principal, the TMB CCW Alt Stage 10.2 La Tête aux Vents – Lac Blanc – Refuge La Flégère, and the Grand Balcon Sud, among others. This means you might encounter hikers on longer treks.

Given the challenging terrain and alpine environment, you should pack appropriate gear. This includes sturdy trail running shoes with good grip, layers of clothing (even in summer, conditions can change rapidly), a waterproof jacket, sufficient water and snacks, a map or GPS device, sunscreen, sunglasses, and a first-aid kit. Trekking poles can also be very helpful on the steep sections.

Yes, the La Flégère Refuge is located near the start/end point if you begin from the gondola. There is also the Refuge du Lac Blanc right by Lac Blanc, offering food, drinks, and accommodation during its operating season. These refuges are excellent spots to refill water or take a break.

Due to its significant elevation gain (over 1190 meters) and rugged, technical terrain, this loop is generally rated as difficult and is not recommended for beginner trail runners. It requires a good level of fitness, experience with alpine conditions, and confidence on steep, rocky paths, including sections with ladders. There are more suitable beginner trails in the Chamonix valley.

To fully appreciate the stunning views of the Mont Blanc massif and avoid the busiest times, consider starting your jog early in the morning. The light is often best for photography, and you'll experience more tranquility, especially around Lac Blanc, before the main crowds arrive. The section known as the "Grand Balcon Sud" offers particularly spectacular ridge line vistas.