{ 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 selling of your data. European mapping, privacy respected.
This route in your pocket: offline maps, guidance and safety alerts.
Distance70.33 km
Elevation gain2657 m
Elevation loss2075 m
Estimated time19 h 50 min
Altitude maximum1213 m
Altitude minimum468 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
70.33 km loop hiking starting from Seiffen.
This hike includes 11 significant climbs. With a total elevation gain of 1275 m across 17.86 km, with an average slope of 7.1%.
- Climb 1 (at km 842 m): +46 m over 405 m, average slope 11.3%
- Climb 2 (at km 6.95 km): +183 m over 1.09 km, average slope 16.8%
- Climb 3 (at km 13.77 km): +175 m over 1.81 km, average slope 9.7%
- Climb 4 (at km 19.96 km): +88 m over 1.40 km, average slope 6.3%
- Climb 5 (at km 23.68 km): +110 m over 1.80 km, average slope 6.1%
- Climb 6 (at km 29.60 km): +40 m over 819 m, average slope 4.9%
- Climb 7 (at km 33.43 km): +38 m over 852 m, average slope 4.5%
- Climb 8 (at km 39.45 km): +123 m over 1.52 km, average slope 8.1%
- Climb 9 (at km 51.02 km): +218 m over 4.04 km, average slope 5.4%
- Climb 10 (at km 56.80 km): +165 m over 2.02 km, average slope 8.2%
- Climb 11 (at km 61.03 km): +89 m over 2.11 km, average slope 4.2%
isomaps
Scan to open this route in the app
This route in your pocket: offline maps, guidance and safety alerts.
-
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