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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 10 and 120 kilometers. Visit the organization's website for the most recent information.

France Val-d'Oise Île-de-France Saint-Leu-la-Forêt

Race information

Website
UTMB 20K UTMB 50K UTMB 100K UTMB 100M
120 km
5500 m+
120 Km – 5500m D+
75 km
3300 m+
75 Km – 3300m D+
45 km
2100 m+
45 Km – 2100m D+
20 km
900 m+
20 Km Nocturne – 900m D+
20 km
900 m+
20 Km – 900m D+
10 km
400 m+
10 Km – 400m D+
Visit the organization's website for the most recent information.
Trail runs nearby

Elle & Lui - Saint-Paul (60)

Saint-Paul - 49 km from Saint-Leu-la-Forêt

The Elle & Lui - Saint-Paul (60) will take place in Saint-Paul on Saturday 20 September 2025. You can run between 15 and 15 kilometers.

Trail des 3 Forêts - Clichy-sous-Bois

Clichy-sous-Bois - 25 km from Saint-Leu-la-Forêt

The Trail des 3 Forêts - Clichy-sous-Bois will take place in Clichy-sous-Bois on Sunday 21 September 2025.

La Maurecourtoise

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L'Enjambée de la Mauldre

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The L'Enjambée de la Mauldre will take place in Maule on Sunday 21 September 2025.

Trail des Sources de l'Yvette (TSY)

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