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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. 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
Les 40 Bosses - 120 Km
Les 40 Bosses - 20 Km Nocturne
Les 40 Bosses - 20km
Les 40 Bosses - 45km
Les 40 Bosses - 75 Km
Visit the organization's website for the most recent information.
Trail runs nearby

Course Dau'Fis

Le Vésinet - 16 km from Saint-Leu-la-Forêt

The Course Dau'Fis will take place in Le Vésinet on Thursday 9 October 2025. You can run 5 kilometers.

La Hongremanienne

Magny-le-Hongre - 45 km from Saint-Leu-la-Forêt

The La Hongremanienne will take place in Magny-le-Hongre on Saturday 11 October 2025. You can run 16 kilometers.

Trail des Nouettes

Versailles - 26 km from Saint-Leu-la-Forêt

The Trail des Nouettes will take place in Versailles on Sunday 12 October 2025. You can run between 10 and 18 kilometers.

Hautil Trail Tour

Pontoise - 11 km from Saint-Leu-la-Forêt

The Hautil Trail Tour will take place in Pontoise on Sunday 12 October 2025. You can run between 17 and 30 kilometers.

Rétro Run - Saint-Ouen-sur-Seine

Saint-Ouen-sur-Seine - 13 km from Saint-Leu-la-Forêt

The Rétro Run - Saint-Ouen-sur-Seine will take place in Saint-Ouen-sur-Seine on Sunday 12 October 2025. You can run between 5 and 10 kilometers.

Trail des 7 Hameaux

Magny-les-Hameaux - 34 km from Saint-Leu-la-Forêt

The Trail des 7 Hameaux will take place in Magny-les-Hameaux on Sunday 12 October 2025. You can run between 13 and 24 kilometers.