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Thames Path Ultra Challenge 2025

Walk, jog, or run this ultra challenge and raise money to help us beat blood cancer.

Over 3000 adventurers will join the Putney Bridge start. The full 100km route heads upstream to Henley along the famous Towpath and continues through Richmond, Hampton Court, Runnymede, and Windsor, with some wonderful scenery to a riverside finish line.

With three quarter, half, quarter distance options also available – plus the separate 25km ‘Thames Bridges Trek’ & ‘The Moonlight 10 Walk’ through Central London as part of the weekend – there’s a Thames Challenge for everyone!

Your entry includes free food and drink at regular rest stops, plus support including medics, marshals and massage. As you cross the finish line, you’ll get a glass of fizz and a medal to commemorate your achievement.

Overview

  • Sign up (from £10) and fund vital research to help beat blood cancer.
  • Inclusive & fun event with a great atmosphere and camaraderie.
  • Choose your distance, including 25km, 50km, 100km PLUS a Henley 10 km option.
  • Walk, jog, or run – it’s your challenge, your way!
  • A fully signed route, with a team of ‘Trekmasters’ out on the trail with you.
  • Regular covered rest stops, with free food & drink, massages and medics.
  • An epic finish line moment, with a glass of fizz, medal and t-shirt.
  • Camping and transfer options to make getting there & away easy.
  • Full fundraising support, and a choice of fundraising options.

Sign up to the Thames Path Ultra Challenge

This ultra challenge event is run via event partner Action Challenge. Sign up to the Thames Path Ultra Challenge.

A group of walkers taking part in a charity walk cross the river Thames. The sun is setting and they are smiling.

Thames Path Ultra Challenge FAQs

You must be 18 or over (on the day of the challenge) if taking on a Full Challenge (~100km) or Three Quarter Challenge (~75km); 16+ and accompanied by an adult if taking on a Half Challenge (~50km ), 14+ and accompanied by an adult if taking on a Quarter Challenge (~25km) or Marathon); for a Half Marathon aged 12+ and accompanied by an adult; and finally 8+ & accompanied by an adult for a 10km/mile Challenge.

Under 18s taking part must be signed up by someone over 18.

For full information about the challenge and FAQs, please visit the official organiser's website.

You are also welcome to contact the Blood Cancer UK Supporter Relations team on 0808 2080 888 or email [email protected]