Sentier du Syl au Trou bleu
Key facts
- Distance
- 14.9 km
- Ascent
- +12 m
- Descent
- −11 m
- Estimated time
- 3 hr 20
- hiking ; mtb : 1 hr 05
- Difficulty
- Moderate
- official rating
- Route
- Loop
- back to the start
Official time: 4 h
Profile and gradient
- under 10%
- 10 to 20%
- over 20%
Gradient along the route: 14.9 km under 10%. Elevation from 2 m to 15 m over 14.9 km.
Surface and path types
- Surface
- Paved 26%
- Dirt & gravel 74%
- Path types
- Trail 8%
- Track 67%
- Road 25%
Description
Difficulty
Official rating: moderate, by Département de Loire-Atlantique.
Getting there
Start: Lavau-sur-Loire, Lavau-sur-Loire (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, 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 2026Liaison sentier du Syl et Sentier du Marais du FresnierPays de la Loire, Lavau-sur-Loire (44) · LoopOfficial rating by Département de Loire-Atlantique
Plan IGN © IGN 2026Sentier de la Vallée MismyPays de la Loire, La Chapelle-Launay (44) · LoopOfficial rating by Département de Loire-Atlantique
Plan IGN © IGN 2026Sentier des Belles DemeuresPays de la Loire, Bouée (44) · LoopOfficial rating by Département de Loire-Atlantique
Plan IGN © IGN 2026Sentier du BelvédèrePays de la Loire, Savenay (44) · LoopOfficial rating by Département de Loire-Atlantique
Plan IGN © IGN 2026Sentier du Marais du FresnierPays de la Loire, Savenay (44) · LoopOfficial rating by Département de Loire-Atlantique
Plan IGN © IGN 2026Sentier du Marais de la RochePays de la Loire, Bouée (44) · LoopOfficial rating by Département de Loire-Atlantique