4.3
(52)
148
riders
66
rides
Mountain biking around Boursonne offers access to the expansive Forêt de Retz, one of France's largest national forests, covering approximately 13,000 hectares. This ancient woodland is characterized by majestic beech and red oak trees, providing a diverse natural environment. The terrain includes varied topography with plateaus and areas of relief, such as the "butte du Faîte" at 245 meters, contributing to dynamic riding experiences with notable elevation gains.
Last updated: June 24, 2026
5.0
(1)
6
riders
50.5km
03:58
550m
550m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
5.0
(1)
4
riders
40.7km
03:13
420m
420m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.

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7
riders
52.5km
04:30
710m
710m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
3.0
(1)
3
riders
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
5.0
(2)
4
riders
26.2km
02:07
350m
340m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
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I recommend doing it electric
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Super nice to stroll by the pond :)
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Pierrefonds Castle is a fortified castle built at the end of the 14th century, located in Pierrefonds, in the Oise. It is a medieval castle rebuilt for Napoleon III by Viollet-le-Duc.
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Very good conversion of the old railway line into a greenway: some passages are lit, others are in the shade, a wooded area for the most part, it is a very pleasant greenway to do. Too bad it does not continue to the D33 and that there is this intersection with the farm path.
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The towpath that crosses La Ferté Milon is a must. As the section is closed to bicycle traffic, it is a must-see hiking trail, rather than a must-see mountain bike trail; and given the terrain, it would even be more Gravel than mountain bike, if bicycles were allowed to circulate. The Ruins of the Castle is a good place to stop: for the history, the panoramic view and the restaurant.
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The Château d'Oigny-en-Valois is a monument located in the commune of Oigny-en-Valois It is listed as a Historic Monument. It opens its doors exclusively to the European Heritage Days. https://officiel-galeries-musees.fr/lieu/chateau-doigny-en-valois/
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As you explore the enchanting forest surrounding Pierrefonds Castle, you’ll discover a network of cycle paths. This majestic medieval fortress, with its imposing towers and fortified walls, provides a breathtaking backdrop for your hike.
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Magnificent castle built in 1397, then reinvented in the 19th century. The view from the castle across the lake is superb.
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There are over 50 mountain bike trails around Boursonne, primarily within the expansive Forêt de Retz. These routes cater to various skill levels, with 6 easy, 46 moderate, and 1 difficult trail available.
Mountain biking in Boursonne offers access to the vast Forêt de Retz, one of France's largest national forests. You'll experience diverse topography, including plateaus and areas with relief like the 'butte du Faîte' at 245 meters, providing dynamic riding experiences through ancient woodlands dominated by majestic beech and red oak trees. The area is known for its 'rugged beauty' and extensive network of forest paths.
The mountain bike trails around Boursonne are highly rated by the komoot community, with an average score of 4.4 stars from over 40 reviews. Riders often praise the varied terrain, the beauty of the Forêt de Retz, and the options available for different skill levels.
Yes, there are several easy mountain bike trails around Boursonne. An excellent option for beginners is the Pond Along the Grivette – Greenway of the Pays de Valois loop from Cuvergnon, which is 15.3 miles (24.7 km) long and features a gentle elevation gain.
While most trails are moderate, the varied topography of the Forêt de Retz includes areas with significant relief and elevation gains, with some routes requiring advanced riding skills. There is at least one difficult trail listed, and many moderate routes, such as the Saint Pondron Church – Retz Forest loop from Villers-Cotterêts, offer substantial distances and elevation changes, providing a good challenge.
You'll primarily encounter the dense, ancient woodlands of the Forêt de Retz, characterized by majestic beech and red oak trees. The forest also features varied terrain with plateaus and some relief, including rock formations. A unique natural curiosity nearby is a cavity housing the largest known underground river in Picardie, though not directly on the trails.
Yes, several routes pass by interesting historical sites and landmarks. For instance, the View of Pierrefonds Castle – Pierrefonds Pond loop from Villers-Cotterêts offers views of Pierrefonds Castle. Another route, the Château de Villers-Cotterêts – Tour télécom loop from Villers-Cotterêts, explores the forest around the Cité Internationale de la Langue Française – Château de Villers-Cotterêts. You might also encounter other castles like Château d'Oigny-en-Valois or historical sites like La Ferté-Milon.
Yes, the varied topography of the Forêt de Retz, including areas like the 'butte du Faîte' at 245 meters, suggests opportunities for scenic views. Some routes, such as the View of Pierrefonds Castle – Pierrefonds Pond loop from Villers-Cotterêts, are specifically highlighted for their scenic outlooks.
The Forêt de Retz is beautiful year-round, but spring and autumn generally offer the most pleasant conditions for mountain biking. The mild temperatures and vibrant foliage (or budding leaves) make for an enjoyable experience. Summer can also be good, with the forest providing shade, while winter rides are possible but may involve colder, potentially wetter conditions.
Yes, many of the mountain bike routes around Boursonne are designed as circular loops, allowing you to start and end at the same point. Examples include the Mountainbike loop from La Ferté-Milon and the Pond Along the Grivette – Greenway of the Pays de Valois loop from Cuvergnon.
Yes, parking is generally available at various access points to the Forêt de Retz and near villages like Villers-Cotterêts, which serve as starting points for many mountain bike routes. Specific parking information can often be found on individual route pages or local tourism websites.
While Boursonne itself is a small village, nearby towns like Villers-Cotterêts may offer public transport connections that can get you closer to the Forêt de Retz. However, direct public transport access to specific trailheads with bikes might be limited, so checking local bus or train schedules and bike policies is recommended.
Generally, mountain biking on marked trails within the Forêt de Retz does not require a specific permit. As a national forest, it is open for public recreation. However, it's always advisable to respect local regulations, stay on designated paths, and be mindful of other forest users. For more detailed information on forest access, you can consult resources like Pays de Valois Tourisme.
Yes, the region offers family-friendly cycling options, particularly on easier routes and greenways. The Pond Along the Grivette – Greenway of the Pays de Valois loop from Cuvergnon is an easy mountain bike ride that could be suitable for families, especially those with some cycling experience. The Greenway of the Pays de Valois itself is a dedicated cycle path, offering a safe and enjoyable environment for family rides.
Dogs are generally permitted in the Forêt de Retz, but they must be kept on a leash, especially during certain periods (e.g., hunting season) and in areas with wildlife. Always ensure your dog is under control and respect any specific signage or local regulations you encounter on the trails.


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