
Wild Valleys of Belleville: 3 Days of Trekking in the Heart of Nature
- 3 Days
- From June to September
An unforgettable immersion into the vast landscapes of Belleville
Looking to escape into the heart of the Alps and immerse yourself in raw, untouched nature? The Wild Valleys of Belleville trek invites you to adventure, contemplation, and self-discovery. Over three days, you’ll traverse diverse landscapes, from dense forests and vast alpine pastures to high-altitude passes with breathtaking panoramas. This trek unveils a valley where time seems to stand still, far from the bustle of ski resorts, where only the whispers of the wind and the songs of birds break the silence.
Each stage is designed to offer a unique experience: a first gentle day to acclimate and soak up the mountain atmosphere, a second more demanding day that will take you through secret and wild valleys, and finally, a last day that will gradually bring you back to your starting point, with a majestic descent between ridges and spectacular gorges.


Day 1: La Flachère → Plan Lombardie Mountain Refuge
- Distance: 5.76 km
Elevation gain: 436 m
Difficulty: Moderate
Points of interest:
Longefrasse Forest
Nant Brun Footbridge
La Sauce Hamlet
Plan Lombardie Mountain Refuge
This first day is easy-going and accessible, perfect for warming up before the next two days, which will require more effort. The trek starts from La Flachère, a charming authentic hamlet nestled deep in the Belleville Valley. After a gentle initial climb through Longefrasse Forest, you will reach the Deux-Nants junction before crossing the Nant Brun footbridge. The trail then leads through La Sauce, another high-altitude hamlet, before beginning the final ascent to Plan Lombardie Mountain Refuge, where you will spend your first peaceful night.

Day 2: Plan Lombardie Mountain Refuge → Gittamelon Mountain Refuge
Distance: 18.08 km
Elevation gain: 893 m
Difficulty: Challenging
Points of interest:
- Nant Brun Valley
Col du Bonnet du Prêtre
- Col du Châtelard
Encombres Valley
Gittamelon Mountain Refuge
This day takes you through a wild and untouched environment. From the mountain refuge, you descend back to La Sauce before entering the Nant Brun Valley, where the only sounds accompanying your ascent are those of rushing streams and wildlife. After a gradual climb, you will reach Col du Bonnet du Prêtre, then continue towards Col du Châtelard. The crossing of the Varlossière valley and the Encombres Valley reveals stunning Alpine landscapes, blending flower-filled pastures with steep rocky slopes. You will finally arrive at Gittamelon Mountain Refuge, a true haven of peace, tucked away from the more frequented trails.



Day 3: Gittamelon Mountain Refuge → La Flachère
Distance: 14.53 km
Elevation gain: 803 m
Difficulty: Moderate
Points of interest:
Priots Hamlet
Planlebon Gorges
Planlebon Hamlet
Pointe de Daillait
Col de la Machoui
For this final stage, you begin the descent by passing through Priots Hamlet, then reach Frachettes parking area. The trail winds through the Planlebon Gorges, offering a spectacular setting before crossing the remains of Planlebon Hamlet. The hike continues towards La Gittaz, followed by a final ascent to Pointe de Daillait and Plan des Queux. From Col de la Machoui, you start the last descent towards La Flachère, marking the end of this immersive journey through the Wild Valleys of Belleville.

Practical Information
Level: Intermediate to experienced hikers
Accommodations: Guarded mountain refuges with meal services
Recommended equipment: Hiking shoes, clothing suited for mountain conditions, backpack with water and snacks
Access to the starting point:
By public transport: Train + shuttle, information available at the Saint-Martin-de-Belleville Tourist Office
By car: 2h15 from Lyon, 1h20 from Chambéry
Les 3 Vallées
The Most Beautiful Treksof Les 3 Vallées
Escape to the heart of Les 3 Vallées with our most stunning trekking routes. Between panoramic ridges, hidden valleys, and welcoming mountain refuges, set off on a unique adventure in nature. Whether you're a seasoned hiker or seeking an escape, explore our exceptional itineraries for an unforgettable mountain journey!