Be careful, it's uphill! – Start Hautil! loop from Zone d'effondrements permanents - Danger

Routes

Mountain biking trails

France

Ile-de-France

Saint-Germain-En-Laye

Triel-Sur-Seine

Be careful, it's uphill! – Start Hautil! loop from Zone d'effondrements permanents - Danger

Moderate

riders

Be careful, it's uphill! – Start Hautil! loop from Zone d'effondrements permanents - Danger

01:35

15.2km

370m

Mountain biking

Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary. The starting point of the route is accessible with public transport.

Last updated: August 23, 2026

Tips

Includes a segment in which cycling is not permitted

After 2.34 km for 142 m

Waypoints

Start point

Bus stop

Get Directions

3.40 km

Be careful, it's uphill!

Highlight • Other

Take a good look at the singles, they are not necessarily very visible on either side of the drivable track.

Translated by Google •

Tip by

3.53 km

Cave of the Vexin Français Regional Nature Park

Highlight • Cave

difficult to access because full of cut branches on the other hand it is cold inside

Translated by Google •

Tip by

4.46 km

Start Hautil!

Highlight • Other

Very nice riding area,

Translated by Google •

Tip by

8.05 km

1st fontis

Highlight • Other

Course on a former gypsum quarry, many sinkholes are present in the woods. I put you a link presenting the history of this hill: ruedeslumieres.morkitu.org/espace_photos/ile_france/hautil/index_hautil.html

Translated by Google •

Tip by

9.40 km

Large Sinkhole in Parc Naturel Régional du Vexin Français

Highlight • Natural Monument

There are huge sinkholes in this forest!!! Yes, these ponds are collapses filled with water!!

Translated by Google •

Tip by

11.9 km

Fun outing in L'Hautil

Highlight • Other

Very nice passage in the middle of the ponds left by the fontis

Translated by Google •

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12.0 km

Condécourt / Hautil Forest outing

Highlight • Other

Stay safe

Translated by Google •

Tip by

12.3 km

Huge sinkhole!

Highlight • Other

These ponds are in fact only collapses filled with water! Huge sinkholes!

Translated by Google •

Tip by

15.2 km

End point

Bus stop

Way Types & Surfaces

Way Types

10.6 km

4.16 km

297 m

109 m

Surfaces

13.2 km

1.61 km

406 m

Elevation

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

Weather

Friday 23 October

13°C

7°C

99 %

Additional weather tips

It’s set to rain on your activity. Pack a waterproof jacket.

to get more detailed weather forecasts along your route

Comments

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Be careful, it's uphill! – Start Hautil! loop from Zone d'effondrements permanents - Danger

Be careful, it's uphill!

Cave of the Vexin Français Regional Nature Park

Start Hautil!

1st fontis

Large Sinkhole in Parc Naturel Régional du Vexin Français

Fun outing in L'Hautil

Condécourt / Hautil Forest outing

Huge sinkhole!

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