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All outdoor activities
Hiking, trail running, cycling, ski touring, snowshoeing.
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Distance17.73 km
Elevation gain39931 m
Elevation loss39576 m
Estimated time5 h 30 min
Altitude maximum490 m
Altitude minimum-28988 m
TypeLoop
DifficultyVery hard
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About this trail
17.73 km loop hiking starting from Sumner.
This hike includes 3 significant climbs. With a total elevation gain of 683 m across 5.00 km, with an average slope of 13.7%.
- Climb 1 (at km 8.90 km): +263 m over 1.77 km, average slope 14.8%
- Climb 2 (at km 12.52 km): +127 m over 944 m, average slope 13.5%
- Climb 3 (at km 16.52 km): +293 m over 2.28 km, average slope 12.9%
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Privacy-first analytics, hosted in France. Your data stays yours.
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Truly free — no hidden premium
Topo maps, GPX, offline use included. No premium paywall.
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A real app, not just a website
iOS + Android with offline topo maps and live GPS navigation.
French independent team — GDPR-native
