The 2026 Grand Solidarity Challenge: a charity race to combat multiple sclerosis at Parc de Sceaux

Solidarity-minded athletes and weekend runners chasing a higher purpose gather this Sunday, October 18, 2026 at the Parc de Sceaux (92) to rally against multiple sclerosis! Come run or walk with friends or family, and even with your dog on a leash, along the charity routes of 5 and 2.5 km, in this emblematic Hauts-de-Seine park, in a natural setting, across several distances accessible to all, including children, up to 10 km!

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A broad mobilization to raise awareness about multiple sclerosis research and to support the 130,000 people living with this progressive neurological condition in France. On the vibe side, the Grand Défi Solidaire is a full day to be shared in a welcoming, festive atmosphere, with group warm-ups and a wide array of animations on the agenda.

The Schedule

• 08:00: Event village opens
• 09:30: Start of the 5 km walk
• 09:40: Start of the 2.5 km walk
• 10:00: Start of the 5 km race
• 10:30: Start of the 10 km race
• 11:00: Stretching and breathing workshop
• 11:30: Awards ceremony
• 12:00: Start of the 1 km kids' race

The 2025 Guide to Solidarity Running Events in Paris and Île-de-France
Running enthusiasts: do you love lacing up and sprinting with the wind at every opportunity? Or perhaps you’re keen to push yourself to support a cause you care about? Read on to discover our pick of charity races in Paris and the Île-de-France region this year, 2025. [Read more]