Le Colomby
Key facts
- Distance
- 14.7 km
- Ascent
- +890 m
- Descent
- −826 m
- Estimated time
- 5 hr 10
- hiking
- Difficulty
- Difficult
- official rating
- Route
- Loop
- back to the start
Official time: 6 h
Profile and gradient
- under 10%
- 10 to 20%
- over 20%
Gradient along the route: 8.8 km under 10%, 3.3 km at 10 to 20% and 2.6 km over 20%. Elevation from 1,135 m to 1,685 m over 14.7 km.
Surface and path types
- Surface
- Paved 2%
- Dirt & gravel 97%
- Unknown 1%
- Path types
- Trail 56%
- Track 41%
- Road 2%
- Off-network 1%
Difficulty
Official rating: difficult, by Département de l'Ain.
Getting there
Start: Parking du Pailly, Gex, Gex (01).
Sources
- Track: Département de l'Ain, PDIPR, Licence Ouverte 2.0, Licence Ouverte 2.0 (Etalab) (departement-ain.opendata.arcgis.com/datasets/ain::pdipr-itineraire). Time estimated by GPX Path with the Mac app rule, breaks not included.
- Official time: 6 h, departement-ain.opendata.arcgis.com
- 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: 890 m, Département de l'Ain
Nearby tracks
Plan IGN © IGN 2026 · track © OpenStreetMapLes ArcetsHaut-Jura, Prémanon (39) · Point to point
Plan IGN © IGN 2026Les hauts sommetsHaut-Jura, Thoiry (01) · LoopOfficial rating by Département de l'Ain
Plan IGN © IGN 2026Sur les traces des passeursHaut-Jura, Thoiry (01) · LoopOfficial rating by Département de l'Ain
Plan IGN © IGN 2026Sur les pas des moinesHaut-Jura, Chézery-Forens (01) · LoopOfficial rating by Département de l'Ain
Plan IGN © IGN 2026Sentier Prairies d'EchallonHaut-Jura, Belleydoux (01) · LoopOfficial rating by Département de l'Ain
Plan IGN © IGN 2026Les Roches d'OrvazHaut-Jura, Belleydoux (01) · LoopOfficial rating by Département de l'Ain