Thames Path Ultra Challenge 2026 - The Lily Foundation
The Lily Foundation logo featuring a butterfly, hearts and an 'x' for a kiss

Fighting mito,
finding hope.

Four Lily Fundraisers, laughing, covered in mud at a Tough Mudder event Four Lily Fundraisers, laughing, covered in mud at a Tough Mudder event

Thames Path Ultra Challenge 2026

A lady in a Lily Foundation top holding walking poles and standing in front of the Thames Path challenge finishers' banner

Ultra marathon run/walk

Start date: 12 Sep 2026

End date: 13 Sep 2026

Sign-up fee: £15 and upwards

Join 3000 adventurers for an unforgettable challenge along the Thames!

Start at Putney Bridge and follow the famous towpath upstream to Henley, passing through Richmond, Hampton Court, Runnymede and Windsor. Enjoy scenic views and a thrilling riverside finish at Henley.

What to expect

There are rest stops with food and drink, medical and massage support and a fully signed route with GPS tracking to guide you. A big finish-line celebration awaits with an amazing sense of achievement, and once the aches subside you’ll feel energised and up for more of life’s real challenges!

Choose your challenge

Whether you’re going for the full 100km or a shorter option, there’s something for everyone:

  • Full challenge (100 km loop)
  • 3/4 challenge
  • Half challenge
  • Quarter challenge
  • Henley 10km

Find out more about the challenge and sponsorship options available.