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Cul-de-Chien Sand Dunes – Les sables du Cul de Chien loop from Parking de la Canche aux Merciers

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Hiking trails & Routes

Cul-de-Chien Sand Dunes – Les sables du Cul de Chien loop from Parking de la Canche aux Merciers

Hard

4.9

(44)

191

hikers

Cul-de-Chien Sand Dunes – Les sables du Cul de Chien loop from Parking de la Canche aux Merciers

03:26

12.1km

150m

Hiking

Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required. The starting point of the route is right next to a parking lot.

Last updated: May 1, 2026

Tips

Includes segments that may be dangerous

Parts of this route comprise highly technical, difficult, or hazardous terrain. Specialist equipment and prior experience is required.

After 2.76 km for 79 m

After 2.90 km for 1.77 km

Waypoints

Start point

Parking

Get Directions

1.66 km

Northern start of the 25 Bosses Circuit

Highlight • Trail

The 25 Bosses circuit is both an unparalleled adventure site for the Paris region and a meeting place for trail, hiking and climbing enthusiasts.
The route of the trail is wonderfully well thought out, it offers superb technical sections that make walking (or running) very fun.

Some passages require bending down, pulling yourself up, getting on all fours. Watch out for backpacks and trash pads for those who come to climb.

Translated by Google •

Tip by

3.85 km

Jean des Vignes

Highlight • Viewpoint

As at the top of many bumps in the area, impressive panorama on the forest massif of Fontainebleau!

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4.42 km

Templar cross ?

Highlight • Other

There is no classic wayside cross (sometimes called a field cross in the open field) or a summit cross that crowns a mountain, but a rock engraving. The lower half of the drawing—whenever scratched into the rock—shows a chalice, such as might be used at Eucharistic celebrations. The outer edge of the vessel is decorated with a cross. Another great cross grows out of the chalice itself.
Whether this rock engraving is actually connected to the order of the Knights Templar (the exact name was “Poor Knighthood of Christ and the Temple of Solomon in Jerusalem”), as indicated as a question in the highlight title, I cannot judge. In this case it would have to go back to the 12th or 13th century, i.e. it would have to have been preserved for a very long time.

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4.61 km

Lookout Rock

Highlight • Viewpoint

cooo

Tip by

5.82 km

Cul-de-Chien Sand Dunes

Highlight (Segment) • Natural

A nice sandy spot for a well-deserved break!
Super calm / empty out of season - apparently stormed in high season

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Tip by

6.14 km

Dune of the Bois de la Commanderie

Highlight • Natural Monument

You don't expect this place in the middle of the forest

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6.36 km

Les sables du Cul de Chien

Highlight • Natural Monument

A surprising space in the middle of the forest of Fontainebleau, the sands of Cul de Chien originated 30 million years ago. At the time there was a warm ocean here that deposited quartz in its depths. Time doing its work, it disintegrated into sand, forming this beach in the middle of the woods.

In addition to the surprising environment, the sands of Cul de Chien represent a mythical place in the history of climbing in Fontainebleau.

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8.88 km

Turtle Rock

Highlight • Natural Monument

This rock is one of many rocks in the area with an evocative shape. Here you can't go wrong, the turtle makes a remarkable appearance overlooking the path.

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Tip by

12.1 km

End point

Parking

Way Types & Surfaces

Way Types

6.53 km

3.51 km

1.89 km

139 m

Surfaces

6.67 km

2.65 km

2.61 km

139 m

Elevation

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

Highest point (120 m)

Lowest point (70 m)

Weather

Tuesday 14 July

34°C

21°C

-- %

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Cul-de-Chien Sand Dunes – Les sables du Cul de Chien loop from Parking de la Canche aux Merciers

Northern start of the 25 Bosses Circuit

Jean des Vignes

Templar cross ?

Lookout Rock

Cul-de-Chien Sand Dunes

Dune of the Bois de la Commanderie

Les sables du Cul de Chien

Turtle Rock

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