{ const t = document.getElementById('trace-toast'); if (!t) return; t.querySelector('.toast-msg').textContent = $event.detail.msg; t.classList.add('show', $event.detail.type === 'danger' ? 'bg-danger' : ($event.detail.type === 'warning' ? 'bg-warning' : 'bg-dark'), 'text-white'); setTimeout(() => t.classList.remove('show'), 3500); })()">
Directions to trailhead
GPX downloaded! Open this trail in Isomaps for offline GPS navigation and topo maps.
-
No ads, no third-party trackers
Privacy-first analytics, hosted in France. Your data stays yours.
-
Truly free — no hidden premium
Topo maps, GPX, offline use included. No premium paywall.
-
A real app, not just a website
iOS + Android with offline topo maps and live GPS navigation.
-
All outdoor activities
Hiking, trail running, cycling, ski touring, snowshoeing.
French independent team — GDPR-native
Distance31.48 km
Elevation gain2636 m
Elevation loss1956 m
Estimated time11 h
Altitude maximum2119 m
Altitude minimum971 m
TypeOut & back
DifficultyVery hard
Weather forecast
5-day MeteoBlue forecast at the trail start — free with an account.
Create free account
About this trail
31.48 km loop hiking starting from Les Houches.
This hike includes 7 significant climbs. With a total elevation gain of 1565 m across 10.12 km, with an average slope of 15.5%.
- Climb 1 (at km 6.32 km): +593 m over 3.60 km, average slope 16.5%
- Climb 2 (at km 9.35 km): +50 m over 117 m, average slope 42.9%
- Climb 3 (at km 13.20 km): +70 m over 603 m, average slope 11.6%
- Climb 4 (at km 15.18 km): +41 m over 305 m, average slope 13.5%
- Climb 5 (at km 22.35 km): +579 m over 4.51 km, average slope 12.8%
- Climb 6 (at km 25.61 km): +194 m over 780 m, average slope 24.9%
- Climb 7 (at km 28.55 km): +38 m over 202 m, average slope 18.9%
-
Share photos of your trails
Help the community discover what each route really looks like.
-
No ads, no third-party trackers
Privacy-first analytics, hosted in France. Your data stays yours.
-
Truly free — no hidden premium
Topo maps, GPX, offline use included. No premium paywall.
-
A real app, not just a website
iOS + Android with offline topo maps and live GPS navigation.
French independent team — GDPR-native