Ultra Challenge Series

Take on a challenge at your pace and fundraise for Guts UK with the UK’s number one series of treks and trail runs!

Whether along a stunning coastline or on trails through magnificent countryside, you’ll get full support all the wa, including plenty of food and drinks, medics and massage, camaraderie, a medal and a t-shirt – and an amazing sense of achievement.

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

• London Winter Walk
  Bath 50 Ultra Challenge
  Windsor 50 Ultra Challenge 
  Isle of Wight Ultra Challenge
  Jurassic Coast Ultra Challenge
  London to Brighton Ultra Challenge 
  Lake District Ultra Challenge
  Cotswold Way Ultra Challenge
  North Yorkshire Ultra Challenge
  Peak District Ultra Challenge
  Gower Peninsula Ultra Challenge
  South West Coast 50 Ultra Challenge 
  North Downs 50 Ultra Challenge
  London Summer Walk
  South Coast Ultra Challenge
  Thames Path Ultra Challenge
  Thames Bridges Trek 
  Thames Moonlight 10
  Chiltern 50 Ultra Challenge
  Kent Downs 50 Ultra Challenge
  London Halloween Walk 

Why take part for Guts UK?

• Receive a free Guts UK top to wear during the event.
• Have exclusive access to our WhatsApp group to chat to all likeminded fundraisers.
• Join our Strava group.
• Dedicated support is on hand from our small but mighty fundraising team.
• Every pound you raise supports our vital work, which includes:
  • Providing information and support for those living with digestive conditions and symptoms.
  • Funding life-changing research into the whole digestive system.
  • Delivering public education and awareness campaigns and events.