Les Foulées Bleues comprises two seaside nature races in Concarneau, Finistère, typically held in September. La Petite Bleue, the shorter event, covers approximately 7 km and begins at 10:00 from Quai de la Croix, with a limit of 500 participants. The primary Foulées Bleues race is about 13.1 km, commencing half an hour later from the same quay, and accommodates up to 1,000 runners. Both are open to all participants; the shorter course is particularly suited for novices and those seeking a straightforward, quick run within a group.
The 7 km path is undulating with no significant challenges, whereas the longer race combines road and trail sections, offering more seaside exposure. Both routes traverse the pleasure port, the Ville Close, the corniche, and a greenway before concluding in the town center. The 13.1 km course additionally incorporates a segment of the GR 34 coastal path. Previous course details indicate the short race is nearly level and shares the initial part with the main route, benefiting both newcomers and runners aiming for a fast finish. This event is a long-established local fixture in a community deeply connected to its historic walled old town, fishing harbor, and shoreline.