The Grand Solidarity Challenge is back at the Parc de Sceaux!

Every day in France, hundreds of people live with multiple sclerosis, the leading cause of severe non-traumatic disability in young adults. To advance research and raise public awareness of this still incurable disease, France Sclérose en Plaques is organizing a new edition of the Grand Solidarity Challenge, its major sports and charity event, on Sunday, October 18, 2026.

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After a 2025 edition that brought together more than 2,200 participants and raised over €60,000, the Grand Solidarity Challenge returns on Sunday, October 18, 2026, at the Parc de Sceaux (Hauts-de-Seine), on the Plaine des 4 Statues.

Organized by France Sclérose en Plaques, this sports and solidarity event offers several formats accessible to everyone:

• 10 km and 5 km timed race
• 5 km and 2.5 km solidarity walk
• 1 km children's race
• An event village, group warm-ups, awareness spaces, and numerous opportunities for socializing

This year, two major new features enrich the event:

• The Connected Challenge from October 5 to 25, to participate from anywhere in France, even remotely.
• Online fundraising, allowing each participant to create their own page and mobilize their network in the fight against multiple sclerosis.

The first 3,000 registrants will also receive the official 2026 edition t-shirt.

Whether you are a runner, walker, volunteer, or simply supportive of the cause, join us to make this new edition a great moment of collective mobilization.

Each registration contributes directly to funding the missions of France Sclérose en Plaques: supporting innovative research projects, accompanying those affected, and raising public awareness.

Register now:
https://grand-defi.france-sclerose-en-plaques.org/

Organization contact: solidairesenpeloton@francesep.org

Our take on this event

Lace up your trainers and turn your movement into a meaningful contribution at the sprawling green grounds of the park. Whether you are aiming for a personal best on the track or enjoying a charity walk, this event is all about coming together for a vital cause.

The Grand Défi Solidaire returns to the Plaine des 4 Statues at parc de Sceaux on Sunday, October 18, 2026, from 08:00 to 14:00. This charitable sporting event, hosted by France Sclérose en Plaques, invites runners and walkers of all levels to participate in 10 km or 5 km races, 5 km or 2.5 km solidarity walks, and a 1 km kids' run. Join the community for a day featuring warm-ups and awareness activities while directly supporting the fight against multiple sclerosis. With 3,000 official event t-shirts available for early registrants, your participation helps fund vital research and support services for those affected by the condition.

Hosted by France Sclérose en Plaques, the Grand Défi Solidaire turns the Plaine des 4 Statues in parc de Sceaux into a hub of community action. On Sunday, October 18, 2026, the event runs from 08:00 to 14:00, offering a range of activities including timed 10 km and 5 km races, 5 km and 2.5 km solidarity walks, and a 1 km children's race. Beyond the sports, attendees can enjoy a village featuring various animations, group warm-ups, and dedicated spaces to learn more about the cause.

This year introduces two major additions: a remote 'Challenge Connecté' taking place across France from October 5 to 25, and a new online fundraising tool that allows participants to mobilize their personal networks. Every registration directly funds research and support initiatives for individuals living with multiple sclerosis. Registrants should note that the first 3,000 sign-ups will receive an official event t-shirt. Whether you are a dedicated runner, a casual walker, or a volunteer, your involvement is crucial to the success of this solidarity movement.