4.4
(287)
1,735
riders
171
rides
Mountain biking around Oncy-Sur-École offers diverse terrain within the Gâtinais Français Regional Natural Park and near the Fontainebleau forest. The region is characterized by extensive woodlands, scenic ponds, and varied topography, providing a dynamic environment for riders. Trails often feature a mix of forest paths and open sections, with some routes incorporating moderate elevation changes. This area provides a natural setting for mountain biking, with generally mud-free conditions and some sandy sections.
Last updated: July 4, 2026
4.2
(22)
260
riders
44.7km
03:38
390m
390m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
3.9
(14)
32
riders
16.9km
01:24
150m
150m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

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4.9
(7)
16
riders
22.9km
01:41
180m
180m
Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.
4.3
(3)
25
riders
25.1km
01:54
170m
170m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
18
riders
17.8km
01:29
180m
180m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
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Beautiful village for tourism, a few small passages allow you to sneak here and there.
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Easy to access, quite large, and well located for starting a hike or mountain bike ride.
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In the Fontainebleau forest, the Belvédères trail is a playful single track that combines viewpoints and technique.
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The cyclops visit is not free, 12 euros entry but it lasts 45 minutes and is very interesting. Limit of 25 people at a time. Please note that photos inside are prohibited. I recommend the first visit at 10:30 a.m. (less crowded)
2
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superb hiking route without many people easy level different reliefs magnificent views
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Small corner isolated enough to be outside the hordes of walkers
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There are over 160 mountain bike trails around Oncy-sur-École, offering a wide range of options for different skill levels. This includes more than 50 easy routes, over 100 moderate trails, and a dozen more challenging paths for experienced riders.
The terrain around Oncy-sur-École, nestled within the Gâtinais Français Regional Natural Park and near the Fontainebleau forest, is diverse. You'll find extensive woodlands, scenic ponds, and varied topography. Trails often feature a mix of forest paths and open sections, with some routes incorporating moderate elevation changes. While some sandy sections exist, the trails are generally known for being mud-free, providing good riding conditions.
Yes, Oncy-sur-École offers over 50 easy mountain bike routes. A great option for less experienced riders or families is the Panorama – Belvédères Trail loop from Milly-la-Forêt, an 11.1-mile (17.9 km) path that offers scenic views and is suitable for all skill levels.
For those seeking a moderate challenge, there are over 100 such trails. Consider the Coquibus Pond – Belvedere Trail loop from Oncy-sur-École, a 27.4-mile (44.2 km) route exploring varied landscapes. Another popular choice is the Domaine de Courances – The Cyclop loop from Milly-la-Forêt, a 14.3-mile (22.9 km) trail leading through woodlands and past cultural landmarks.
The mountain biking routes around Oncy-sur-École are highly rated by the komoot community, with an average score of 4.4 stars from over 260 reviews. Riders often praise the quiet woodlands, the varied topography, and the generally mud-free conditions, making for an enjoyable experience within the Gâtinais Français Regional Natural Park.
Yes, many of the mountain bike trails around Oncy-sur-École are designed as loops. Examples include the Coquibus Pond – Belvedere Trail loop from Oncy-sur-École, the Panorama – Belvédères Trail loop from Milly-la-Forêt, and the Coquibus Pond – The Cyclop loop from Milly-la-Forêt, all offering scenic circular journeys.
The region is rich in natural beauty. You'll encounter extensive woodlands, tranquil ponds like Coquibus Pond, and varied topography within the Gâtinais Français Regional Natural Park. Some trails also lead past unique geological formations such as the Béorlots Sand Dune or the Rocher de Corne-Biche.
Yes, the area combines natural beauty with cultural heritage. Along some routes, you might encounter historical sites such as the Chapelle Sainte-Blaise, known for housing Cocteau's tomb, or the ancient menhir de la Pierre Droite (menhir du Paly). The The Cyclop, a unique art installation, is also a notable landmark that can be seen on trails like the Coquibus Pond – The Cyclop loop from Milly-la-Forêt.
The region's trails are generally mud-free, making them enjoyable for much of the year. Spring and autumn offer pleasant temperatures and beautiful scenery with changing foliage. Summer provides shaded routes through the dense forests, while winter riding is possible due to the good trail conditions, though always check local weather forecasts.
Yes, the region boasts several impressive estates and castles. You can find highlights such as Fleury-en-Bière Castle, La Bonde Castle, and the magnificent Domaine de Courances, which is also featured on routes like the Domaine de Courances – The Cyclop loop from Milly-la-Forêt.
Absolutely. The presence of ponds, such as Coquibus Pond, is a recurring feature in many trail names and routes, indicating opportunities for waterside riding. Additionally, the Singletrack Along the Essonne – Montée de la Garenne loop from Milly-la-Forêt suggests trails that run alongside the Essonne river, offering scenic views and a different riding experience.


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