On 18 October 2026, Sceaux Park will host the Grand Défi Solidaire, organised by the Multiple Sclerosis Foundation. This event celebrates sport whilst supporting medical research through a range of activities for all ages.
Practical information
| Dates | 18 October 2026 |
| Address | Château de Sceaux, musée départemental, Domaine départemental de Sceaux, 92330 Sceaux |
| Updated | 24 July 2026 |
Why go?
This event stands out for its commitment to supporting research into multiple sclerosis. It is an inclusive sports day open to everyone, from beginners to experienced participants. Perfect for sports enthusiasts and anyone wishing to support a worthy cause in the great outdoors.
What to see / do
The Grand Défi Solidaire offers a variety of sporting activities.
- 10 km run: a challenge for runners.
- 5 km run: suitable for beginners and intermediate runners.
- 5 km walk: a leisurely option for walkers.
- 2.5 km walk: perfect for families and children.
- 1 km children’s run: designed specifically for younger children to encourage their participation.
Good to know
You can look forward to a fun-filled day with plenty of activities.
- Be prepared for queues at the venue, especially early in the day.
- Make sure you bring water and snacks, especially if you’re taking part in the races.
- The park is a lovely place for a stroll after the event.
How to get there
From Châtelet, it takes about 40 minutes on the RER B to Sceaux station. You can also take the 192 bus from Montparnasse station.
What to do nearby?
Nearby, you can visit: 1. Sceaux Park (within the estate itself): the perfect spot for a picnic. 2. Sceaux Castle (a 5-minute walk away): steeped in history, with magnificent gardens. 3. The Multiple Sclerosis Foundation Centre (a 10-minute walk away): to learn more about the condition.
Things to bear in mind
| Top photo spot | The gardens of the château offer stunning views for photos. |
| Ideal for | Families, runners, and anyone wishing to support an important cause. |
| Estimated visiting time | Allow approximately 3 to 4 hours for the event. |
| Best time to visit | Arrive early to enjoy all the activities on offer. |
| Nearby activity to combine | Also visit the Château de Sceaux right after the event. |
Frequently asked questions
What are the distances of the races offered?
The races offered include 10 km and 5 km, as well as walks of 5 km and 2.5 km, and a 1 km race for children.
Are there any registration fees?
The registration fee is not currently disclosed.
How can I access the parc de Sceaux by public transport?
The park is accessible by RER B to Sceaux, about 40 minutes from Châtelet.
What activities are available for children?
There is a race specifically designed for children of 1 km.
Is this event accessible for people with reduced mobility?
Information on accessibility is not provided, it is best to contact the organisers for more details.
What is the purpose of this event?
The Grand Défi Solidaire aims to support research on multiple sclerosis through a day of sporting activities.