Ultra Challenge Series 2026

UK’s No 1 Series of treks & trail runs! Take on a challenge at your pace and fundraise for your favourite charity! Whether along a stunning coastline or on trails through magnificent countryside, you’ll get full support all the way – including plenty of food and drink, medics and massage, camaraderie, a medal and T-shirt - and an amazing sense of achievement.

With 20 events to choose from, and distance options ranging from 10 km up to the full 100 km – there’s an Ultra Challenge waiting for you in 2026.

London Summer Walk banner

How to take part in the Ultra Challenge Series

I need a place

There are lots of funding options for all events within the series, 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

More events you may be interested in

  • Run, Walk

    Bath 50 Ultra Challenge

    Take on the Bath 50 Ultra Challenge and walk, jog or run throughout and around the elegant and historic city of Bath!

  • Challenge, Run, Walk

    Gower Peninsula Ultra Challenge

    Set in the stunning Gower Peninsula, why not take on this NEW challenge for 2025 to ensure no one faces kidney disease alone!

  • Run, Walk

    South West Coast 50 Ultra Challenge

    With three distances to choose from, the South West Coast 50 Ultra Challenge is the perfect summer challenge for everyone!