4.5
(24)
127
riders
27
rides
Gravel biking around Rosny-Sur-Seine offers diverse terrain, characterized by extensive forestland, scenic riverbanks, and proximity to natural parks. The region features the vast Forêt Régionale de Rosny with varied woodlands and agricultural areas, alongside the generally flat towpaths of the Seine River. Nearby limestone cliffs and hillsides provide more challenging ascents and descents, while the Vexin Français Regional Natural Park expands options for longer routes.
Last updated: May 22, 2026
4.3
(4)
18
riders
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
7
riders
32.7km
02:12
230m
230m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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4.3
(3)
11
riders
29.7km
01:50
120m
120m
Easy gravel ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
3
riders
17.4km
01:26
250m
250m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.6
(7)
34
riders
44.0km
02:45
150m
150m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Very well-maintained facility, easy to reach with the hordes of tour buses
1
0
Pretty quiet village on the Seine
1
0
Superb and very confortable to get to, free parking close by.
0
0
A lovely spot for a picnic. There's even a crêpe vendor. You can cross the Seine by ferry. Bicycles are welcome. Check in advance for opening and closing dates.
0
0
There are over 20 gravel bike trails around Rosny-sur-Seine, offering a variety of experiences from leisurely rides to more challenging routes. The komoot community has explored these diverse paths over 120 times.
Yes, Rosny-sur-Seine offers several gravel routes suitable for beginners and families. The towpaths along the Seine River provide pleasant, generally flat routes, perfect for a relaxed experience. For example, the Le Vieux-Moulin – Le Vieux Moulin (Vernon) loop from Bonnières is a moderate trail that leads through varied landscapes, often completed in about 2 hours 15 minutes.
You can expect a diverse range of terrain. The extensive Rosny Forest features varied woodlands, plateaus, and agricultural areas. Along the Seine River, you'll find generally flat towpaths, often with unpaved sections. For more challenging rides, the limestone cliffs and hillsides near La Roche-Guyon offer ascents and descents with rewarding vistas.
Yes, for experienced riders seeking longer distances, the region offers routes that can extend into the Vexin Français Regional Natural Park. A challenging option is the View of Îlon Harbor – La Roche-Guyon Castle loop from Bonnières, which covers over 100 km and includes significant elevation changes.
Absolutely. Many of the gravel bike trails around Rosny-sur-Seine are designed as loops, allowing you to start and finish at the same point. Popular circular routes include the View of Îlon Harbor – Banks of the Seine at Vétheuil loop from Follainville-Dennemont and the Ile aux Dames – View of Îlon Harbor loop from Saint-Martin-la-Garenne, both offering scenic river views.
While gravel biking, you can encounter several interesting landmarks. Routes may pass by the grounds of the Château de Rosny-sur-Seine. A notable historical site is the La Roche-Guyon Castle, a medieval fortress near the Seine. Natural features include the Cliffs of La Roche-Guyon and the Châtillon Belvedere in Rosny Forest, offering panoramic views of the Seine loops.
The best time for gravel biking in Rosny-sur-Seine is generally during spring, summer, and early autumn. These seasons offer pleasant weather conditions for exploring the forest trails and riverside paths. While winter riding is possible, some trails, especially in the forest, might become muddy after heavy rain.
Parking is generally available in and around the villages that serve as starting points for many routes, such as Follainville-Dennemont, Saint-Martin-la-Garenne, or Bonnières. Look for public parking areas in these towns to access the trails conveniently.
Rosny-sur-Seine is accessible by public transport, particularly via train services that connect to nearby towns like Mantes-la-Jolie. From these hubs, you can often cycle directly to the trailheads or use local bus services that accommodate bikes, depending on the route and time of day. The Ile aux Dames – View of Îlon Harbor loop from Mantes Station is a route that starts directly from a train station.
Yes, the towns and villages surrounding the gravel bike routes, such as Rosny-sur-Seine itself, La Roche-Guyon, and Bonnières, offer various options for refreshments and accommodation. You'll find local cafes, restaurants, and guesthouses where you can refuel and relax after your ride.
The gravel biking routes in Rosny-sur-Seine are highly rated by the komoot community, with an average score of 4.3 stars from over 24 reviews. Cyclists often praise the region's diverse landscapes, from the tranquil Seine riverbanks to the extensive Rosny Forest, and the well-maintained paths that offer a mix of challenges and scenic beauty.
Many routes in the region incorporate sections of the Rosny Forest, which is a major draw for gravel bikers due to its varied terrain and natural beauty. While specific named routes might traverse different parts, you can expect to find numerous footpaths and trails within this 1,500-hectare forest suitable for gravel biking.
Generally, dogs are permitted on many public trails in natural areas like the Rosny Forest, provided they are kept on a leash and you follow local regulations regarding pet waste. However, it's always advisable to check specific signage at trailheads or local municipality guidelines for any restrictions on particular paths or protected areas.


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