4.4
(45)
822
riders
140
rides
Road cycling routes around Saint-Illiers-Le-Bois traverse the tranquil French countryside, characterized by diverse landscapes and well-maintained paved surfaces. The region offers a network of routes through serene greenery, including areas like Rosny Forest, and features varied elevation suitable for different skill levels. This area, part of the Yvelines department, provides a peaceful escape for road cyclists.
Last updated: May 18, 2026
3.8
(24)
160
riders
85.6km
03:37
500m
500m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
16
riders
73.2km
03:04
490m
490m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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10
riders
134km
05:38
900m
900m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.
9
riders
165km
07:07
1,230m
1,230m
Hard road ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride.
4.0
(2)
6
riders
37.0km
01:35
230m
230m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
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Maybe the oldest medieval small castle still in an almost original state
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Beautiful castle with a beautiful forest nearby 😉
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Beautiful castle on the banks of the Seine
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very nice walk, little elevation but traffic on weekends
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0
There are over 140 road cycling routes available around Saint-Illiers-Le-Bois. These routes cater to various skill levels, with 35 easy, 94 moderate, and 11 difficult options.
The region offers pleasant cycling conditions throughout much of the year, with its tranquil countryside and green landscapes. Spring and autumn generally provide ideal temperatures and beautiful scenery, though summer can also be enjoyable, especially in the shaded forest areas.
You can expect diverse landscapes ranging from serene countryside and green groves to extensive forests like Rosny Forest. The terrain includes mostly paved surfaces, ideal for road cycling, with varied elevation profiles from moderate loops to more challenging rides with significant elevation gains, such as those found on the Behoust Castle – Château de Tilly loop from Bréval.
Yes, the region offers several routes suitable for all fitness levels, including 35 easy routes. These typically feature less elevation and shorter distances, allowing for a relaxed experience through the tranquil French countryside.
Many of the road cycling routes around Saint-Illiers-Le-Bois are designed as loops, allowing you to start and end at the same point. Examples include the popular La Roche-Guyon Castle – Ile aux Dames loop from Bréval and the Avre Aqueduct – Anet Castle loop from Bréval.
The routes often pass by charming historical sites and natural features. You can encounter quaint churches like Neauphlette Church, impressive châteaux such as Château de Tilly, and scenic viewpoints like the Belvédère de Rolleboise, offering expansive views of the Seine.
While Saint-Illiers-Le-Bois itself is a tranquil village, the wider Yvelines department is well-connected. For specific public transport options that accommodate bikes, it's advisable to check local train and bus services from nearby towns like Bréval, which often serve as starting points for many routes.
Parking is generally available in and around the village of Saint-Illiers-Le-Bois, as well as in nearby towns like Bréval, which serve as common starting points for many cycling tours. Look for designated parking areas in village centers or near local amenities.
The region offers various charming towns and villages where you can find cafes, restaurants, and accommodation. While Saint-Illiers-Le-Bois is small, nearby areas provide options ranging from gites to hotels, catering to visitors looking for a place to rest and refuel.
The road cycling routes in Saint-Illiers-Le-Bois are highly rated by the komoot community, with an average score of 4.3 stars from over 50 reviews. Cyclists frequently praise the serene countryside, the well-maintained paved surfaces, and the variety of routes that cater to different skill levels, often highlighting the peaceful escape into the French countryside.
Yes, Saint-Illiers-Le-Bois benefits from its proximity to broader cycling networks. The 'Vallée du Loir by bike' (V47) passes through nearby Illiers-Combray, and this route also intersects with the Saint-Jacques à Vélo route and is a stop on the Véloscénie (Paris-Mont-Saint-Michel cycle route). Longer national routes like the 474 km 'La Véloscénie from Paris to Mont Saint-Michel' and the 520 km 'The Avenue Verte London-Paris' also traverse the Yvelines department, offering extensive cycling adventures. More information can be found on France Vélo Tourisme.
Absolutely. For experienced cyclists seeking a challenge, routes like the Palace of Versailles – Grand Canal loop from Bréval offer significant elevation gains, with over 1200 meters of ascent over its 163 km distance. The region provides options that require very good fitness, ensuring a demanding ride.


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