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London's Big Ben in the moonlight
Walking

Thames Moonlight 10 Challenge

A fantastic evening walk through London, taking in famous landmarks along a great route with full support.

  • Date: 12th September 2025
  • Registration fee: £10-£49
  • Fundraising target: £75-£150
Sign up

Choose from a 10km or 10-mile route, passing some of London’s best-known landmarks – including St Paul’s Cathedral, Westminster Abbey, Tower Bridge, the London Eye and more!

Starting and finishing at the Oval, you’ll receive full support along the route and a celebratory finish line moment, with a medal, a glass of fizz and hot food.

As Dementia UK is an official partner of this event, you will receive a 50% discount on the original ‘full sponsorship’ registration fee when signing up to support families affected by dementia.

Head to the Dementia UK Ultra Challenge page to find out full details of prices and to sign up.

  • 10-mile Challenge
  • 10km Challenge
  • a branded Dementia UK technical sports top
  • training plans
  • support from our Fundraising Team
  • fundraising advice, hints and tips in the build-up to the event
  • a range of Dementia UK fundraising materials (collection buckets, posters, balloons etc) to make any events you hold look amazing
  1. Full sponsorship: you pay a small registration fee and we’ll cover the remaining cost of your event place as long as you hit your fundraising goal! As we are an official charity partner, you will receive a 50% discount on the original registration fee. Price after the charity partner discount:
    • registration fee £10, fundraising target £150
  2. Mixed funding: pay half the cost of your event place yourself, fundraise a bit less and we’ll cover the balance of your place in the event.
    • registration fee £25, fundraising target £75
  3. Own place fundraising: you pay the full cost of your event place yourself, then fundraise as much as you can – there’s no set target or deadline, and no cost at all to Dementia UK.
    • registration fee £49, no minimum fundraising target

For specific event questions, please get in touch with the Ultra Challenge Team at info@actionchallenge.com