Tonnerre – Fosse Dionne loop from Fleys

Bike touring routes & trails

France

Bourgogne-Franche-Comté

Avallon

Fleys

Tonnerre – Fosse Dionne loop from Fleys

Hard

riders

Tonnerre – Fosse Dionne loop from Fleys

03:14

46.4km

670m

Cycling

Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: September 25, 2026

Tips

Includes a segment that goes up or down a series of steps

You may need to carry your bike.

After 35.0 km for 24 m

Waypoints

Start point

Parking

Get Directions

3.12 km

Saint-Martin Collegiate Church

Highlight • Religious Site

The Saint-Martin collegiate church from the 12th and 13th centuries is very well preserved. The church is definitely worth a visit. A special feature is the south portal, whose door …

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33.0 km

Burgundy Canal

Highlight • Other

A long ribbon of water crossing the countryside for 242 kilometers: here is the Burgundy Canal, which connects the Yonne to the Saône and Migennes to Saint-Jean-de-Losne. For some, it …

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33.6 km

The Burgundy Canal is 242 km long, it connects the Seine basin to the Rhône basin. Previously used for moving goods, but since the 1960s the canal has been used almost exclusively for recreational boating.

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34.4 km

Tonnerre

Highlight • Settlement

Tonnerre is a small village with character nicknamed "La petite Venise bourguignonne". To see among others: the perpetual waters of the mysterious Fosse Dionne, the Saint-Pierre Church, the Hôtel Dieu …

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35.0 km

Fosse Dionne and the town of Tonnerre

Highlight • Historical Site

The Dionne pit is a karst spring known as the Vaucluse source. It is in fact a resurgence located in the city center of Tonnerre. His presence is at the …

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35.0 km

Fosse Dionne

Highlight • Natural Monument

The Dionne pit is a karst source called the Vauclusian source, located in the city center of Tonnerre. It is fed by the infiltration of precipitation into the surrounding limestone …

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