40
km
1,200
D+
Race profile
Les 40 Bosses is a 40 km trail race with 1,200 m of elevation gain, located in Saint-Rémy-lès-Chevreuse, Seine-et-Marne. The next edition is scheduled for .
Find all official information on the race website.
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Practical info
Typetrail
OFFICIAL LINKS
60 seconds. Built on the ITRA / UTMB / B-Trail databases.
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