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Les 40 Bosses

Name: Les 40 Bosses
Start: 2026-12-05
End: 2026-12-06
Location: Saint-Leu-la-Forêt

Saint-Leu-la-Forêt, France • 5-6 Dec 2026

The Les 40 Bosses will take place in Saint-Leu-la-Forêt from Saturday 5 December 2026 to Sunday 6 December 2026. Visit the organization's website for the most recent information.

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

Race information

Website

Les 40 Bosses - 120 Km

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

Saturday Apr 11

Trail Tour du Massif Montmorencéen (2T2M)

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The Trail Tour du Massif Montmorencéen (2T2M) will take place in Montlignon on Saturday 11 April 2026. You can run between 5 and 80 kilometers.

Saturday Apr 11

La Noctambule de Grosbois

Marolles-en-Brie

11 km

Half Marathon

The La Noctambule de Grosbois will take place in Marolles-en-Brie on Saturday 11 April 2026. You can run between 11 and 21 kilometers.

Saturday Apr 11

Trail des Coteaux de Guerville

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The Trail des Coteaux de Guerville will take place in Mantes-la-Ville on Saturday 11 April 2026. You can run between 15 and 42 kilometers.

Sunday Apr 12

Trail Urbain de Sèvres

The Trail Urbain de Sèvres will take place in Sèvres on Sunday 12 April 2026. You can run between 8 and 15 kilometers.