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Routes
Mountain biking trails
France
Ile-de-France
Palaiseau
Montlhéry

Saint-Yon Church – Lac d'Olainville loop from Montlhéry

Routes
Mountain biking trails
France
Ile-de-France
Palaiseau
Montlhéry

Saint-Yon Church – Lac d'Olainville loop from Montlhéry

Moderate

5

riders

Saint-Yon Church – Lac d'Olainville loop from Montlhéry

03:38

48.8km

420m

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: May 26, 2026

Tips

Includes a segment in which cycling is not permitted

After 36.7 km for 85 m

Waypoints

A

Start point

Bus stop

Get Directions

1.28 km

Forêt Départementale de Bellejame

Forest

2

21.1 km

Baville Castle

Highlight • Castle

17th century castle with a large park. Difficult to access, via a somewhat muddy paved road

Translated by Google •

Tip by

22.6 km

Bois du Boulay

Forest

4

22.8 km

Le petit saut de la tuilerie

Highlight (Segment) • Other

5

29.8 km

Porte des Bourdeaux...

Highlight • Other

The place takes its name from Saint-Yon, a Christian martyr beheaded by Roman soldiers on this hill. The church and the Porte des Bourdeaux are the remains of a village …

Translated by Google •

Tip by

6

29.8 km

Saint-Yon Church

Highlight • Religious Site

Very beautiful chapel, but there is a small dimension.

Translated by Google •

Tip by

7

29.9 km

King of the hard end

Highlight • Other

It is at the end of a climbing and winding road that we discover the small church of Saint-Yon, and its adjoining cemetery. Here rests, under an ancient mausoleum, Maurice …

Translated by Google •

Tip by

8

36.0 km

Lac d'Olainville

Highlight • Lake

After having traveled about twenty kilometers along the barley starting from Morsang sur orge, this lake offered us a magnificent landscape, hidden between the trees.
It was difficult to leave this place to come back home!

Translated by Google •

Tip by

9

37.2 km

Small houses by the water

Highlight • Other

10

37.8 km

Water Park

Highlight • Other

B

48.8 km

End point

Bus stop

Loading

Way Types & Surfaces

Way Types

25.2 km

9.19 km

7.93 km

6.03 km

470 m

< 100 m

Surfaces

14.2 km

12.6 km

10.9 km

7.85 km

2.00 km

1.24 km

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Elevation

Elevation

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

Highest point (170 m)

Lowest point (40 m)

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Weather

Powered by Foreca

Friday 17 July

28°C

17°C

38 %

Additional weather tips

Max wind speed: 13.0 km/h

to get more detailed weather forecasts along your route

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