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Saint-Germain-Lès-Arpajon

Bonnevaux Castle – Underpass loop from La Norville - Saint-Germain-lès-Arpajon

Saint-Germain-Lès-Arpajon

Bonnevaux Castle – Underpass loop from La Norville - Saint-Germain-lès-Arpajon

Hard

4.0

(1)

riders

Bonnevaux Castle – Underpass loop from La Norville - Saint-Germain-lès-Arpajon

05:26

132km

700m

Road cycling

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is accessible with public transport.

Last updated: June 16, 2026

Tips

Includes segments that go up or down a series of steps

You may need to carry your bike.

After 10 m for 14 m

After 133 km for 14 m

Waypoints

Start point

Train Station

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6.30 km

Notre Dame de l'Assomption parish

Highlight • Other

The church is a synthesis of different architectural types. The oldest part, the bell tower, dates from the end of the 11th – beginning of the 12th century. Towards the end of the 12th – beginning of the 13th century, a nave with two bays, vaulted on ribbed vaults, was added to it. For aesthetic reasons, three buttresses were leveled above the vaults. The remains of this first church are still visible. At the end of the 15th century, after the Hundred Years' War, the increase in population led to the enlargement of the nave, which brought the number of bays to five, and to the creation of the side aisles. This well-proportioned building deserves a thorough visit.

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9.35 km

Saint-Vrain Castle Gate

Highlight • Monument

Very beautiful portal, alas the castle is not visible from the road.

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10.2 km

Saint-Caprais Church of Saint-Vrain

Highlight • Religious Site

The construction of the church dates from the 13th century.

The church was extensively restored after the Hundred Years' War and its orientation was changed in the mid-18th century.

The building was restored again in the 19th century. During these restorations, the local priest died in 1818.

Since a decree of March 27, 1926, the church has been listed as a historical monument.

A porch was demolished in the 1970s.

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50.5 km

Boulancourt Towers

Highlight • Other

This door, which appears medieval, does not go unnoticed with its two towers and the battlements of its curtain wall. Make no mistake, it was built in 1928 on the initiative of Mrs. Belmont, an American national, then owner of the Augerville castle.
This gate now belongs to the commune of Boulancourt.

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