Circuit des Naturalistes
Key facts
- Distance
- 18.0 km
- Ascent
- +105 m
- Descent
- −103 m
- Estimated time
- 4 hr 15
- hiking ; mtb : 1 hr 30
- Difficulty
- Difficult
- official rating
- Route
- Loop
- back to the start
Official time: 4 h 45 min
Profile and gradient
- under 10%
- 10 to 20%
- over 20%
Gradient along the route: 18.0 km under 10%. Elevation from 3 m to 42 m over 18.0 km.
Surface and path types
- Surface
- Paved 40%
- Dirt & gravel 51%
- Unknown 9%
- Path types
- Trail 40%
- Track 20%
- Road 40%
Description
Difficulty
Official rating: difficult, by Département de Loire-Atlantique.
Getting there
Start: Couëron, Couëron (44).
Sources
- Track: Département de Loire-Atlantique, PDIPR, Licence Ouverte 2.0, Licence Ouverte 2.0 (Etalab) (data.loire-atlantique.fr/explore/dataset/224400028_itineraires-de-promenade-et-de-randonnee-en-loire-atlantique-pdipr/). Time estimated by GPX Path with the Mac app rule, breaks not included.
- Official time: 4 h 45 min, data.loire-atlantique.fr
- Surface and path types: © OpenStreetMap contributors, ODbL, extract of 28 October 2026, matched to the track every 10 m (openstreetmap.org/copyright)
Nearby tracks
Plan IGN © IGN 2026Sentier de l'Etang BernardPays de la Loire, Saint-Étienne-de-Montluc (44) · LoopOfficial rating by Département de Loire-Atlantique
Plan IGN © IGN 2026Canal de la MartinièrePays de la Loire, Le Pellerin (44) · LoopOfficial rating by Département de Loire-Atlantique
Plan IGN © IGN 2026Circuit des Villages (Saint-Jean-de-Boiseau)Pays de la Loire, Saint-Jean-de-Boiseau (44) · LoopOfficial rating by Département de Loire-Atlantique
Plan IGN © IGN 2026Sentier des Hauts du SillonPays de la Loire, Saint-Étienne-de-Montluc (44) · LoopOfficial rating by Département de Loire-Atlantique
Plan IGN © IGN 2026Sentier du BerliquetPays de la Loire, Saint-Étienne-de-Montluc (44) · LoopOfficial rating by Département de Loire-Atlantique
Plan IGN © IGN 2026Circuit de la CossonièrePays de la Loire, Le Pellerin (44) · LoopOfficial rating by Département de Loire-Atlantique