4.7
(45)
1,274
riders
200
rides
Road cycling around Oncy-Sur-École offers varied terrain within the Essonne department of Île-de-France. The region is characterized by the École River, which adds scenic elements, and the Mont Grippon massif, suggesting some elevation changes. Cyclists will find routes traversing extensive forests and agricultural land, providing a diverse backdrop for rides. The proximity to the Fontainebleau Massif further expands the range of landscapes available, including additional forest routes and varied topography.
Last updated: July 5, 2026
5.0
(2)
164
riders
83.5km
03:42
640m
640m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
5.0
(1)
24
riders
49.0km
01:57
230m
230m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.

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4.3
(3)
21
riders
66.4km
02:37
250m
250m
Moderate road ride. Good fitness required. Some segments of this route may be unpaved and difficult to ride.
5.0
(1)
7
riders
67.8km
02:52
410m
410m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
5.0
(1)
10
riders
56.0km
02:16
230m
230m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
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Nemours Castle was built starting in the 12th century. In 1926, the castle was listed as a historic monument in France. It is located on the left bank of the Loing River and near the old bridge, allowing it to serve as a defense for the town and a watchtower for the bridge. The fortress-like castle was rebuilt in the 15th and 17th centuries.
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Former market square in the heart of Milly-la-Forêt.
1
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Lovely place for a bike ride.
0
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Lovely place for a bike ride.
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superb little chapel decorated by Jean Cocteau where he rests. a commentary said by Jean Marais accompanied the visit. a so-called simple garden adjoins the chapel. there are many medicinal plants found there. entrance price 3 euros
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The trail moves on to the main essentials The hall In 1479, by a special grace from Louis The North-South facing Hall, 46 m long, 16 m wide and 13 m high, covers a total surface area of 730 m2. 48 oak pillars, resting on “dice”-cut stone bases, support a chestnut frame typical of Ile-de-France at that time; this frame presents to the north (on the rue Langlois side) a “pavilion” farm. Today, La Halle is still the site of a market on Thursday afternoons. The square, the houses gathered all around, bear witness to the great commercial activity which already reigned in the region 500 years ago. La Halle has been classified as a Historic Monument since 1923. Bonde Castle is located near the town center of Milly-la-Forêt, Built near an artificial island in the l'École river to the west of the Notre-Dame collegiate church, its park is bordered to the west by the course of the river which forms a moat to the north protecting the châtelet. History Built in the 12th century by the lords of Milly, the castle was ruined during the English siege in 1432. At the end of the 15th century around 1475, owned by Admiral Louis Malet de Graville, it was rebuilt and enlarged. What was then the keep became the entrance gatehouse, the drawbridge was replaced by a permanent stone bridge and a gate closed access between the northern defense tower and the governor's house. A square courtyard was surrounded by a wall and had in the center a chapel dedicated to Saint Valentine. The castle was successively the property of Hugues III de Bouville, Olivier V de Clisson, Jean II de Montmorency, Jean-François de Faudoas d'Averton, Marc-Antoine Front de Beaupoil de Saint-Aulaire and Pierre Marie of Lau d’Allemans. In the 19th century, the towers of the chatelet were enhanced with brick battlements and a slender roof. In 1859 the Corne bridge was rebuilt near the castle washhouse which served as a watering trough for the animals. At the end of the 20th century the mills along the river were demolished. In 1964, the Bonde washhouse downstream of the river which was part of the estate was rehabilitated. On December 20, 1972, the castle was partly listed as a historic monument. The park was listed in 1991 for its fences, canals and paths. the house of Jean Cocteau. Entrance to the J. Cocteau house [This 17th century residence, flanked by turrets, was formerly called the Governor's House. It corresponds to an old outbuilding of the castle in front of which the vassals came to pay homage and faith to their lord. Jean Cocteau bought this house with Jean Marais in 1947 and lived there until his death. Notre-Dame de l’Assomption Church Founded in the 11th century, the former chapel of the castle, it was rebuilt around 1485 on the orders of Admiral de Graville in the Gothic style of the 13th and 14th centuries. The bell tower, 57 meters high, dates from the 11th century in its lower part and from the 12th and 13th centuries in its upper part. The arch of the main portal in the primitive Romanesque style comes from an old church in Milly (Saint-Pierre or Saint-Jacques). On the east side of the bell tower - Place Grammont side - the arms of Admiral de Graville are still visible. Many works of sacred art are found inside the church. The church was listed as a Historic Monument in 1926. The dovecote; Located on the old triangular square of the dovecote cul de sac, this old building was part of the Domaine du Moustier, property of Fulbert I, lord of Milly and officer at the court of Dagobert I in the 7th century. Destroyed in 1432 or 1433, the complex included a vast farm. According to a count in 1792 it had around 1200 niches. Only the lords held the right to build these premises designed for breeding. The Moustier de Péronne gate is one of the oldest vestiges of Milly and dates from the 7th century. It provided access to the moustier (monastery in old French) owned by Fulbert I, who obtained the land of Milly from Dagobert I. His son Wulfran was born there around the year 635. Entering religion, he became the apostle of the frieze (Netherlands), then bishop of Sens before retiring to Saint Wandrille where he died in 720.
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There is a small museum. The painters (impressionists) used to live in the house.
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Road with bumps so you don't drive fast. Very difficult with the bike.
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There are over 200 road cycling routes available around Oncy-sur-École, catering to various skill levels. This includes approximately 59 easy routes, 135 moderate routes, and 6 more challenging options.
The terrain around Oncy-sur-École is varied, featuring scenic elements along the École River, some elevation changes due to the Mont Grippon massif, and routes traversing extensive forests and agricultural land. The proximity to the Fontainebleau Massif also offers diverse landscapes and additional forest routes.
Yes, you can encounter several interesting features. Routes often pass by historic sites like the Fleury-en-Bière Castle or the impressive Domaine de Courances. The École River itself provides picturesque views, and the Mont Grippon massif offers unique natural formations. You might also spot the La Bonde Castle near an artificial island in the École River.
Yes, the region offers a good selection of easier routes suitable for families. With nearly 60 easy routes available, you can find paths that are less demanding in terms of elevation and distance, allowing for a pleasant cycling experience for all ages. For example, the Bonnevaux Castle – Château de Courances loop from Milly-la-Forêt is rated as easy.
The region is generally favorable for outdoor activities, including road cycling, for much of the year. Spring and autumn typically offer pleasant temperatures and beautiful scenery with changing foliage. Summer is also suitable, though it can be warmer, while winter might be less ideal due to colder weather and potentially wet conditions.
While specific parking locations are not detailed, Oncy-sur-École is a small commune, and parking is generally available in and around the village center. Many cyclists also start their routes from nearby towns like Milly-la-Forêt, where more established parking options may be found.
Public transport options to Oncy-sur-École, especially with a bike, may be limited. It's advisable to check regional bus or train services for specific routes and bike carriage policies, as direct connections might require planning. Many cyclists prefer to drive to the area and start their rides from there.
Oncy-sur-École is a small village, so options within the commune itself might be limited. However, the nearby town of Milly-la-Forêt, which serves as a common starting point for many routes, offers a wider selection of cafes, restaurants, and accommodation suitable for cyclists.
Many of the popular road cycling routes in the area are designed as loops, allowing you to start and finish in the same location. Examples include the Les Affolantes – Barbizon, the painters' village loop from Milly-la-Forêt and the Lavoir d'Orville – Augerville Castle loop from Oncy-sur-École.
The area is highly rated by the komoot community, with an average score of 4.6 stars from over 40 reviews. Reviewers often praise the varied terrain, the scenic beauty of the École River valley, and the peaceful rides through forests and agricultural land. The well-maintained routes and the opportunity to explore historic villages and castles are also frequently highlighted.
While Oncy-sur-École is situated near the Fontainebleau Massif, offering opportunities to explore its diverse landscapes, specific road cycling routes directly entering the massif from Oncy-sur-École are less common. However, routes like Superb road between forests – Fleury-en-Bière Castle loop from Milly-la-Forêt provide a taste of the forested areas characteristic of the wider region.
Absolutely. Many routes are designed to take you through charming villages and past cultural points of interest. For instance, the Château de Courances – Barbizon, the painters' village loop from Milly-la-Forêt passes through the scenic Barbizon area, known for its artistic heritage. You can also explore nearby Milly-la-Forêt, home to the Maison de Cocteau and Chapelle Saint-Blaise-des-Simples.


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