Windsor 50 Ultra Challenge

Take on a 50 km Ultra, a  historic 25 km, or a sharp 10K challenge – and get active. From our Windsor Racecourse basecamp we will head out on  looped routes through the Great Park with fantastic views of the Castle, on to Runnymede, along the Thames Path, and take in some wonderful surrounding countryside. It’s full support all the way, and a celebration finish back at basecamp.  great challenge to enjoy with family, friends, or as a solo adventure!

Join as an individual or as a team; you’ll get full support all the way, plenty of food and drink, a special medal, T-shirt and celebration finish back at basecamp and a great sense of achievement! Push yourself further in 2027 and take on an Ultra Challenge, the UK’s No.1 Series of treks and trail challenges.

Sign up now!

Use the Early Bird Deal!

Kidney Care UK is an associate partner, therefore fundraisers can take 50% off any registration fee, runs until the end of August 2026.

Head to the Ultra Challenge website to discover the full 2027 Ultra Challenge Series and if you have any questions please email [email protected].

Windsor 50 Ultra 26

How to take part in the Windsor 50 Ultra Challenge

I need a place

There are lots of funding options for the ‘South West’ summer challenge, from full charity sponsorship to own place charity fundraising.

I already have a place

If you already have a place and you'd like to use it to raise money for us, we'd love to have you on the team! There is no minimum target to raise.

How we will support you

What to expect when you become a #KidneyWarrior:

  • Charity technical T-shirt
  • Fundraising pack full of helpful hints and tips
  • Dedicated support from our experienced fundraising team
  • Invitation to our #KidneyWarrior Facebook page
Kidney Care UK running T-shirt and fundraising items including a fundraising guide, sponsorship form and collection tins and boxes.

Get your fundraising started!

Our Fundraising Guide is packed with fundraising ideas, tips and information to help you make your event or challenge a success.

Download your Fundraising Guide

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