La Chaussée Jules César et la vallée de la Viosne
Key facts
- Distance
- 11.8 km
- Ascent
- +184 m
- Descent
- −185 m
- Estimated time
- 3 hr
- hiking
- Difficulty
- Not rated
- Route
- Loop
- back to the start
Profile and gradient
- under 10%
- 10 to 20%
- over 20%
Gradient along the route: 11.8 km under 10%. Elevation from 40 m to 108 m over 11.8 km.
Surface and path types
- Surface
- Paved 44%
- Dirt & gravel 56%
- Path types
- Trail 25%
- Track 36%
- Road 39%
Difficulty
No official rating for this track: we do not make one up.
Getting there
Start: Boissy-L'Aillerie, Courcelles-sur-Viosne (95).
Sources
- Track: © OpenStreetMap contributors, ODbL 1.0 (www.openstreetmap.org/relation/14962355). Time estimated by GPX Path with the Mac app rule, breaks not included.
- 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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Plan IGN © IGN 2026 · track © OpenStreetMapLe chemin des CroixÎle-de-France, Labbeville (95) · Loop
Plan IGN © IGN 2026 · track © OpenStreetMapLes sources du SausseronÎle-de-France, Berville (95) · Loop