Sentier Karstique du Grand Bois
Key facts
- Distance
- 1.4 km
- Ascent
- +17 m
- Descent
- −13 m
- Estimated time
- 20 min
- hiking
- Difficulty
- Very easy
- official rating
- Route
- Loop
- back to the start
Official time: 1 h 30 min
Profile and gradient
- under 10%
- 10 to 20%
- over 20%
Gradient along the route: 1.4 km under 10%. Elevation from 440 m to 453 m over 1.4 km.
Surface and path types
- Surface
- Paved 5%
- Dirt & gravel 91%
- Unknown 4%
- Path types
- Trail 95%
- Road 5%
Difficulty
Official rating: very easy, by Département du Doubs.
Getting there
Start: Parking du Sentier Karstique, Mérey-sous-Montrond, Les Monts-Ronds (25).
Sources
- Track: Département du Doubs (explore.doubs.fr), ODbL, ODbL 1.0 (explore.doubs.fr/trek/2430-Sentier-Karstique-du-Grand-Bois). Time estimated by GPX Path with the Mac app rule, breaks not included.
- Official time: 1 h 30 min, explore.doubs.fr
- Surface and path types: © OpenStreetMap contributors, ODbL, extract of 28 October 2026, matched to the track every 10 m (openstreetmap.org/copyright)
- Official elevation gain: 17 m, Département du Doubs
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