Tour Du Mont Blanc - Variante de la Fenêtre d'Arpette
MODERATE (2.2/10)Champex d'en Haut → Grands Dessous
3D Trail Preview
Tour Du Mont Blanc - Variante de la Fenêtre d'Arpette is a 10.0 km point-to-point moderate hiking route in Switzerland, running from Champex d'en Haut to Grands Dessous. The route covers 1,193m of ascent and 1,102m of descent, with elevations ranging from 1,513m to 2,628m. Allow approximately 4h 54m for the full route.
The route is divided into 10 segments. The toughest stretch is the 3.0 km from La Breya to Aiguille de la Cabane, climbing 487m.
Only 44% of the route is below 15% gradient — expect to hike more than you run. The steepest pitches reach 60% gradient.
Budget roughly 2,878 kcal of energy expenditure and 2.9 L of water.
Mountain route up to 2628m. Best June–October; snow possible into June.
Elevation Profile
Route Map
Trail Splits
Waypoint-to-waypoint breakdown with estimated hiking times (Naismith's Rule).
| Segment | Dist | ↑ Ascent | ↓ Descent | Time | Cum. km |
|---|---|---|---|---|---|
📍 Champex d'en Haut → La Breya | 1.3 km | +145m | -8m | 30 min | 1.3 |
⛰️ La Breya → Aiguille de la Cabane | 3.0 km | +487m | -0m | 1h 24m | 4.3 |
⛰️ Aiguille de la Cabane → Six Carro | 0.5 km | +134m | -4m | 19 min | 4.8 |
⛰️ Six Carro → Le Génépi | 0.9 km | +229m | -20m | 34 min | 5.7 |
⛰️ Le Génépi → Someceon du Dru | 0.6 km | +151m | -26m | 23 min | 6.3 |
⛰️ Someceon du Dru → Grand Bec | 0.5 km | +0m | -204m | 16 min | 6.8 |
⛰️ Grand Bec → Pointe de Prosom | 1.3 km | +16m | -376m | 35 min | 8.1 |
⛰️ Pointe de Prosom → Bonhomme | 1.0 km | +18m | -297m | 29 min | 9.1 |
⛰️ Bonhomme → Tronc du Berger | 0.6 km | +5m | -147m | 15 min | 9.7 |
⛰️ Tronc du Berger → Grands Dessous | 0.3 km | +7m | -20m | 4 min | 10.0 |
| Total | 10.0 km | +1,193m | -1,102m | 4h 54m | 10.0 |
Pace & Fuel Calculator
Adjust your flat 10K pace to see personalized finish time, calorie burn, and hydration needs.
Terrain Analysis
Surface & Technicality
⛰️ Highly technical route. Power-hiking the steep sections is expected.
Sun Exposure
☀️ High sun exposure. 44% of the route is above the treeline (2000m) with minimal shade. In summer, start before 7am to avoid peak UV. Carry sunscreen, a hat, and extra water.
Current Conditions
Conditions for June
✅ Snow unlikely at this elevation in June. Trail conditions expected to be clear.
🥾 Muddy sections likely. Waterproof boots recommended.
Snow Conditions
Suggested Gear List
Auto-generated based on 10.0 km, 1193m ascent, max altitude 2628.1m, ~5h duration.
- 👟 Trail running shoes / hiking bootsRequired for any trail
- 📱 Phone (charged) + offline mapNavigation & emergency contact
- 💧 3L hydration vestNo water sources on route
- 🍫 Trail mix, bars & sandwichEst. 2878 kcal burn
- 🧴 Sunscreen SPF 50+UV intensifies above 2000m
- 🧢 Sun hat / capExposed alpine terrain
- 🧥 Windbreaker / shell jacketSummit at 2628.1m — wind chill
- 🆘 Emergency space blanketCritical if injured at altitude
- 🕶️ Sunglasses (cat 3+)Snow & rock glare at altitude
- 🧤 Warm mid-layer (fleece)Temps drop ~6°C per 1000m
- 🔦 Headlamp5h route — plan for delays
- 🩹 Mini first aid kitBlister plasters, tape, antiseptic
- 🥢 Trekking poles64% steep terrain, 1193m+ ascent
- 🧊 Microspikes / light cramponsSnow risk in November, December, January
- 🦵 GaitersKeep snow out of boots
Logistics
This route runs from Champex d'en Haut to Grands Dessous (10.0 km by trail). You'll need to arrange transport back to your starting point.
Nearby Points of Interest
⛰️ Peaks
- La Breya km 1.3 · 1.5 km off trail
- Luy Blanche 1.6 km off trail
- Bonhomme km 0.1 · 1.7 km off trail
- Six Carro km 4.8 · 909m off trail
- Le Génépi km 5.7 · 1.3 km off trail
📍 Nearby Places
- Grands Plans 1.2 km off trail
- Belvédère 1.4 km off trail
- Le Niolet 1.7 km off trail
- P2280 km 5.3 · 826m off trail
- P2364 km 5.5 · 1.1 km off trail
Route Details
- Network
- Regional Trail Network
- Sport
- hiking
- Start
- Champex d'en Haut
- End
- Grands Dessous
- Start Coordinates
- 46.03158, 7.10445
- OpenStreetMap
- View on OSM →
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