Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: January 22, 2026

Waypoints

Start point

Parking

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5.83 km

The Escargots of Cohons

Highlight • Monument

The garden, now gone, came from part of the former episcopal domain of Cohons, made up of the vast forest of Champ Bresson (where we are) and that of Lahie …

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7.26 km

Silière Garden

Highlight • Other

The Jardin de Silière in Cohons was created in 1661, the same year as Versailles, and features a symmetrical design with water features, boxwood, yew, hornbeam and lime trees. You …

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14.7 km

Source of the Marne

Highlight • Other

This is where the Marne, the longest tributary of the Seine, is born. It is a natural source located on the Langres plateau, in the commune of Saints-Geosmes. Protected by …

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14.8 km

Sabinus Cave

Highlight • Cave

The Grotte de Sabinus is a natural cave located near the source of the Marne in Balesmes-sur-Marne. According to legend, this cave was the hiding place of Julius Sabinus, a …

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19.5 km

End point

Parking

Way Types & Surfaces

Way Types

9.50 km

5.37 km

2.96 km

1.64 km

Surfaces

9.84 km

4.28 km

3.77 km

995 m

586 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (470 m)

Lowest point (360 m)

Weather

Tuesday 21 April

18°C

3°C

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The Escargots of Cohons

Silière Garden

Source of the Marne

Sabinus Cave

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