Les Marais de Blanche Noë
Key facts
- Distance
- 17.4 km
- Ascent
- +5 m
- Descent
- −5 m
- Estimated time
- 3 hr 55
- hiking ; mtb : 1 hr 15
- Difficulty
- Difficult
- official rating
- Route
- Loop
- back to the start
Official time: 4 h 15 min
Profile and gradient
- under 10%
- 10 to 20%
- over 20%
Gradient along the route: 17.4 km under 10%. Elevation from 5 m to 13 m over 17.4 km.
Surface and path types
- Surface
- Paved 23%
- Dirt & gravel 77%
- Path types
- Trail 49%
- Track 30%
- Road 21%
Description
Difficulty
Official rating: difficult, by Département de Loire-Atlantique.
Getting there
Start: Nort-sur-Erdre, Nort-sur-Erdre (44).
Sources
- Track: Département de Loire-Atlantique, PDIPR, Licence Ouverte 2.0, Licence Ouverte 2.0 (Etalab) (www.erdrecanalforet.fr/fr/20-circuits-de-randonnee.html?mb_page=circuit&mb_id=15877&use_temp=false&mb_titre=circuit-les-marais-de-blanche-noe-nort-sur-erdre#mb_module). Time estimated by GPX Path with the Mac app rule, breaks not included.
- Official time: 4 h 15 min, erdrecanalforet.fr
- Surface and path types: © OpenStreetMap contributors, ODbL, extract of 28 October 2026, matched to the track every 10 m (openstreetmap.org/copyright)
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