Ultra Challenge Series 2025

Ultra marathon run/walk

Location: All over the UK

Start date: 25 Jan 2025

End date: 25 Oct 2025

Sign-up fee: £40-£575 depending on distance and fundraising options

Take on an unforgettable challenge in 2025

Looking for a new adventure in 2025? Why not gather friends, family or colleagues and take part in a life-changing Ultra Challenge – all while raising vital funds for The Lily Foundation to help fight mitochondrial disease.

These incredible events are great for pushing your limits as an individual, but they’re also perfect for coming together as a team to achieve something truly special. Whether you're a seasoned marathon runner looking to go further, a casual walker ready for a new challenge, or just want to share an unforgettable experience with your crew, there’s an Ultra Challenge for you.

From breath-taking coastal paths to some of the most stunning countryside in the UK, you’ll walk, jog or run at your own pace alongside thousands of other participants, supported every step of the way. With free food and drink at regular rest stops, a fully signed route and an amazing atmosphere, you’ll be inspired to keep going – and celebrate your success as a team.

Choose your challenge – full, half, quarter or even 10k – and make 2025 the year you take on something extraordinary. Together, we can make a difference for those affected by mitochondrial disease.

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Choose your challenge: 

London Winter Walk – 25th-26th January 2025

Bath 50 Ultra Challenge – 29th March 2025

Easter 50 Ultra Challenge – 12th April 2025

Isle of Wight Ultra Challenge – 3rd-4th May 2025

Jurassic Coast Ultra Challenge – 17th-18th May 2025

London 2 Brighton Ultra Challenge – 24th-25th May 2025

Lake District Ultra Challenge – 7th-8th June 2025

Cotswold Way Ultra Challenge – 21st-22nd June 2025

Peak District Ultra Challenge – 28th-29th June 2025

North Downs 50 Ultra Challenge – 12th July 2025

Gower Peninsula Ultra Challenge – 19th-20th July 2025

South West Coast 50 Ultra Challenge – 2nd August 2025

London Summer Walk – 23rd August 2025

South Coast Ultra Challenge – 6th-7th September 2025

Thames Moonlight 10 Walk – 12th September 2025

Thames Bridges Trek – 13th September 2025

Thames Path Ultra Challenge – 13th-14th September 2025

Chiltern 50 Ultra Challenge – 27th September 2025

Kent Downs 50 Ultra Challenge – 11th October 2025

London Halloween Walk – 25th October 2025

You’ll get full support and hospitality all the way, leaving you to focus on your challenge! 

• Walk, jog or run
• Join as an individual or as a team
• Choose a distance from 10km to 100km
• Half or quarter challenge options
• Rest stops with free food and drink
• All food included
• Medics, massage and pace walkers
• Medal, t-shirt and glass of bubbly!
• 2-day full ‘daylight’ option (100km challenges)
• Pre-event training support and app

Choose your fundraising option: 

Full sponsorship: you pay a small registration fee, do lots of fundraising and we cover the cost of your event place. 

• 100km: normal reg fee £40 and fundraising target £575
• Shorter distances and lower fundraising targets also available

Mixed funding: pay half of the event place cost yourself, fundraise a bit less and we pay the balance of the cost of the event place.

• 100km: reg fee £100/fundraising target £300
• Shorter distances and lower fundraising targets also available

Self funding: you pay the full cost of the event place, fundraise whatever you can with no set target or deadline, and there’s no event place cost at all to us. 

• 100km: £198
• Shorter distances and entry fees also available

Find out more and sign up for one of these exciting challenges on the Ultra Challenge website.

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