Les 40 Bosses

Saint-Leu-la-Forêt, France • 6-7 Dec 2025

The Les 40 Bosses will take place in Saint-Leu-la-Forêt from Saturday 6 December 2025 to Sunday 7 December 2025. You can run between 20 and 120 kilometers. Visit the organization's website for the most recent information.

Race information

UTMB 20K UTMB 50K UTMB 100K UTMB 100M
120 km
5500 m+
Les 40 Bosses - 120 Km
75 km
3300 m+
Les 40 Bosses - 75 Km
45 km
2100 m+
Les 40 Bosses - 45km
20 km
900 m+
Les 40 Bosses - 20 Km Nocturne
20 km
900 m+
Les 40 Bosses - 20km
Visit the organization's website for the most recent information.
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