4.4
(2313)
11,846
riders
494
rides
Mountain biking around Guyancourt features a landscape rich in green spaces, forests, and varied terrain, making it suitable for off-road cycling. The area is characterized by numerous ponds, such as Étang de la Minière and Lac de la Sourderie, and includes valleys like the Vallée de la Mérantaise and Vallée de la Bièvre. These natural features, combined with dedicated cycling paths, provide a diverse environment for mountain bikers.
Last updated: May 8, 2026
4.4
(38)
220
riders
41.5km
03:28
450m
450m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
4.6
(54)
187
riders
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.

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4.8
(17)
130
riders
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
4.1
(23)
139
riders
32.5km
02:37
300m
300m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
4.1
(31)
133
riders
26.3km
02:11
230m
230m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
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great intermediate level course of around 1 hour by mountain bike
0
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easy to ride on gravel
0
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easy calm but crowded on weekends in good weather
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0
Small impassable single track, large fallen trunks and mud pools, difficult plan, it is better to go around for the moment
0
0
Guyancourt's mountain bike trails offer a diverse landscape, characterized by numerous ponds such as Étang de la Minière and Lac de la Sourderie, dense woodlands, and varied valleys like the Vallée de la Mérantaise and Vallée de la Bièvre. You'll find a mix of flat sections and moderate climbs, providing varied challenges for mountain bikers.
There are over 490 mountain bike trails around Guyancourt listed on komoot, catering to various skill levels from easy to difficult. This includes 103 easy routes, 266 moderate routes, and 123 difficult routes.
Yes, Guyancourt offers a selection of easy and moderate routes suitable for families. While specific 'family-friendly' designations aren't always explicit, the 103 easy routes provide gentler terrain. Look for trails around the ponds or within the less challenging sections of Parc des Sources de la Bièvre for a pleasant family outing.
Many natural areas in Guyancourt, including the green spaces and forests, are generally dog-friendly. However, it's always recommended to keep dogs on a leash, especially in shared spaces like Parc des Sources de la Bièvre and around the ponds, to ensure the safety and comfort of all users and local wildlife. Check specific park regulations if you plan to visit a particular area.
Guyancourt's trails often pass through beautiful natural settings. You can explore areas around the tranquil Ponds of Parc des Côtes Montbron, the picturesque Étang de la Minière, or the expansive Parc des Sources de la Bièvre. The region also features historical sites like various castles, such as the famous Palace of Versailles nearby, and unique natural monuments like the Menhirs of the Chêne des Missions.
The mountain bike trails in Guyancourt are highly rated by the komoot community, with an average score of 4.4 stars from over 2,000 reviews. Riders often praise the diverse terrain, the scenic beauty of the ponds and forests, and the variety of routes available for different skill levels.
Absolutely. Guyancourt offers 123 difficult mountain bike routes for experienced riders. One challenging option is the Château de Plaisir – Single loop from Saint-Cyr, a 16.3-mile (26.3 km) path with significant elevation changes. Another is the Carrefour des Petits Champs – Val-d'Or Pond loop from Saint-Quentin-en-Yvelines, a difficult 25.5-mile (25.5 km) route.
Guyancourt's trails are enjoyable throughout much of the year. Spring and autumn offer pleasant temperatures and vibrant scenery, making them ideal. Summer can also be good, especially in the shaded forest sections, but be mindful of warmer temperatures. Winters are generally mild, but some trails might be muddy after rain or during colder periods.
Yes, Guyancourt is well-equipped with various parking options, especially near its numerous green spaces and natural areas. For trails starting near major parks like Parc des Sources de la Bièvre or the Étang de la Minière, you will typically find designated parking facilities. It's advisable to check specific starting points for the most convenient parking.
Guyancourt has a good public transport network, making many areas accessible. Buses serve various parts of the commune, and the town is part of the Île-de-France transport system. You can often reach areas close to trailheads via public transport, though you might need to cycle a short distance to the exact starting point.
Yes, Guyancourt has a substantial number of moderate trails, with 266 routes designed for intermediate riders. A good example is the Single from Port-Royal – Descent from Port-Royal Abbey loop from Saint-Quentin-en-Yvelines, a 41.6 km route that offers a balanced challenge without being overly technical.
Generally, no specific permits are required for mountain biking on designated trails in Guyancourt's public natural areas. However, it's crucial to respect local signage, stay on marked paths, and be mindful of other users, as many trails are shared with hikers and walkers. Always check for any temporary restrictions or specific rules for protected zones.


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