Take on a 50 km Ultra, a historic 25 km, or a sharp 10 km challenge and make it an active Easter! From the Windsor Racecourse basecamp, 2000 adventurers will head out on looped routes through the Great Park with fantastic views of the Castle, then on to Runnymede, and along the Thames Path, taking in some wonderful surrounding countryside.

You’ll get full support all the way, and a celebration finish at base camp,

As Macmillan are an official partner, you get a 50% discount on the ‘Charity Sponsorship’ registration fee when signing up to support us. Head to the Macmillan Ultra Challenge page to find out full details of prices and to sign up.

All distance options have Charity, Mixed Funding or Self Fundraising options.

As part of Team Macmillan, you'll receive:

We'll provide you with a reason to keep going because you'll know that you're helping improve the lives of people living with cancer. 

Donations make up 98% of our annual income so we simply couldn't do what we do without you.

For full information on this challenge, please visit the Macmillan Cancer Support Ultra landing page.. You can also find FAQs here, or contact the Action Challenge event organisers directly

Please make sure you have read our Terms and Conditions before signing up.

Each Action Challenge Ultra Series event covers different terrain and landscapes, including steep climbs and descents, stiles, and uneven pathways subject to weather effects. 

If you have any queries about the route, or have any special requirements to consider that you wish to chat through further before registering, please do not hesitate to contact the Action Challenge Team who will be happy to discuss course suitability. 

By joining us you'll know that you're helping improve the lives of people living with cancer in the UK today.