4.3
(737)
5,296
riders
352
rides
Touring cycling around Vallée du Costour, located between Guipavas and Le Relecq-Kerhuon in Brest, France, offers diverse landscapes for outdoor activities. The 129-hectare valley features 120 hectares of woods, prairies, and fields, characterized by serene water bodies including two main ponds and several streams. The terrain includes deciduous forests of chestnut, oak, beech, and maple, providing accessible paths for a relaxed cycling experience. The northern part of the valley also presents geological features like decomposed rock and gneiss.
Last updated: May 11, 2026
19
riders
16.9km
01:26
220m
220m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
9
riders
8.45km
00:32
80m
80m
Easy bike ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.

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4
riders
16.7km
01:10
190m
190m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
6
riders
7.23km
00:28
40m
40m
Easy bike ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
6
riders
16.4km
01:16
270m
280m
Hard bike ride. Good fitness required. You may need to push your bike for some segments of this route.
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A magnificent landscape on both sides!!!
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feet in the water while being in the city.
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In the hollow of the valley, a small stream meanders, feeding many ponds and a waterfall. Perfect for recharging your batteries. This arboretum is sumptuous. You will find incredible tree species, sequoias, eucalyptus, magnolias, giant bamboos and an alley planted with absolutely remarkable tree ferns. On the water, a beautiful diversity of birds, cormorants, herons, egrets, ducks, and kingfishers among others. Good walk a stone's throw from the beach and the marina of the marina.
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In the heart of the Vallon du Stang-Alar, the Botanical Conservatory garden is nestled in a former quarry. The 30-hectare site was chosen for its mild climate, steep slopes and the presence of water, which make it an exceptional place where plants from all over the world can be grown. The site is crossed by wide and narrow, stabilized paths, as well as forest trails. Opening hours Conservative garden: open every day from 9:00 a.m. to 6:00 p.m., until 8:00 p.m. in summer.
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Pedestrian path along the Moulin Blanc marina, accessible by bike provided you ride at walking speed.
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Océanopolis is a national center of scientific culture dedicated to the ocean. It offers guided tours, unique experiences and activities to discover maritime biodiversity and environmental protection.
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Nice view of the bay and easy to drive as no cars can cross this small cycle and pedestrian bridge.
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Moulin Blanc beach is the only fine sand beach in the city of Brest. It was developed over the last century to offer Brest residents a vacation spot close to the city.
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There are over 360 touring cycling routes recorded in Vallée du Costour on komoot. These routes cater to various skill levels, with 125 easy, 154 moderate, and 84 difficult options.
The Vallée du Costour offers a diverse landscape for touring cyclists. You'll find paths winding through 120 hectares of woods, prairies, and fields, alongside serene water bodies including two main ponds and several streams. The terrain features deciduous forests of chestnut, oak, beech, and maple. While many paths are easily accessible, some sections can be rugged or muddy, especially during winter.
Yes, Vallée du Costour has numerous family-friendly options. With 125 easy routes available, you can find paths suitable for a relaxed cycling experience with children. These routes often feature gentle gradients and scenic views of the valley's natural beauty.
Beyond its natural beauty, Vallée du Costour holds historical significance. You can explore remnants of the Poudrerie du Moulin Blanc, a gunpowder factory established in 1876, including two washhouses from the early 20th century. The valley also features a large pond formed from an old quarry and a 30-meter cliff overlooking a water basin in its northern part. For a route that offers a mix of natural and coastal views, consider the Slipway Café – Océanopolis loop from Moulin Blanc, which provides views towards the Bay of Brest.
The touring cycling routes in Vallée du Costour are highly rated by the komoot community, with an average score of 4.4 stars from over 700 reviews. Cyclists often praise the tranquil atmosphere, diverse landscapes, and the variety of paths that cater to different abilities. Many appreciate the blend of natural beauty, from serene water bodies to dense forests, and the accessible network of trails.
Yes, many of the touring cycling routes in Vallée du Costour are designed as loops, offering convenient circular journeys. For example, the Gunnera Stream – Vallée du Costour loop from Moulin Blanc is a popular moderate route that explores the valley's natural features and streams in a circular fashion.
The Vallée du Costour is beautiful year-round, but for touring cycling, spring and autumn generally offer the most pleasant conditions with mild temperatures and vibrant scenery. While paths are generally navigable, some sections can become rugged or muddy in winter, so be prepared for varying trail conditions if cycling during colder, wetter months.
The Vallée du Costour is accessible from various points. You can enter from Allée du Candy in the north, Rue du Rody in the south, and Rue du Costour to the east. While specific parking details for each route vary, these access points typically have nearby parking options. The area's proximity to Brest also means public transport connections might be available to get close to the valley.
Yes, some routes extend towards the Bay of Brest, offering scenic coastal views. The Slipway Café – Océanopolis loop from Moulin Blanc is a moderate route that specifically offers views towards the Bay of Brest and passes by coastal attractions, providing a lovely contrast to the valley's inland scenery.
Vallée du Costour is a biodiversity hotspot. While cycling, you might spot various animal species such as deer, badgers, shrews, fawns, and foxes. Birdwatchers can look out for species like the great spotted woodpecker, green woodpecker, jay, and chiffchaff. The dense undergrowth of holly, hawthorn, and willow provides a rich habitat for these creatures.
Absolutely. With 125 easy routes available, beginners have plenty of options. An example of a relatively easy route that explores urban and coastal areas is the Brest Cable Car – Recouvrance Bridge loop from Océanopolis, which is 11.9 km long and has minimal elevation gain.
While the Vallée du Costour itself is a natural haven, its proximity to Brest and surrounding communes means you can find cafes and other amenities nearby. Routes like the Slipway Café – Océanopolis loop from Moulin Blanc explicitly mention a 'Slipway Café' in their name, indicating places where you can take a break and refuel.


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