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Two walkers in the North Downs
Walking Running

North Downs 50 Challenge

  • Date: 12th July 2025 - 12th July 2025
  • Location: North Downs, West Clandon, Guildford, UK
  • Distance: 50km
  • Registration fee: £10-£139
  • Fundraising target: £70-£375
Sign up

Join us on the North Downs for this fabulous challenge, setting out from our Guildford base camp. Choose your distance and walk, jog or run the full looped 50km route, a 25km half challenge, or the gentler Guildford 10km.

Take in the best of the Surrey Hills, the North Downs Way and the surrounding countryside. The route boasts real variety with wonderful scenery and views, and is easily accessible from London. There’s a North Downs 50 Challenge for everyone!

You’ll receive great hospitality all the way, including free food and drink at regular rest stops along a signed route, plus support from medics, marshals and massage therapists. As you cross the finish line, you’ll get a warm welcome from the cheer squad, a glass of fizz, a t-shirt and a special medal to celebrate your achievement.

You may have to dig deep at times – but you’ll meet new friends along the way, and the journey will be unforgettable!

Join as an individual or as a team and raise funds for families affected by dementia along the way.

As Dementia UK is an official partner of this event, you will receive a 50% discount on the ‘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.

  • 50km challenge
  • 25km challenge
  • Guildford Loop – 10km
  • a branded Dementia UK technical sports top (we’ll send this before your challenge)
  • 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

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. Prices after the charity partner discount are:

  • 50km: registration fee £20, fundraising target £375
  • 24/25km: registration fee £15, fundraising target £275
  • 10km: registration fee £10, fundraising target £100

For charity sponsorship places, to secure your entry, you’ll need to raise 50% of your full fundraising target no later than three weeks before your challenge. You’ll get lots of support and reminders from us to help you achieve this! The remaining sponsorship can be sent to us in time for your event (or no later than four weeks after your challenge).

Mixed funding –pay half the cost of your event place yourself, fundraise a bit less and we’ll cover the balance of your registration fee.

  • 50km: registration fee £75, fundraising target £225
  • 24/25km: registration fee £50, fundraising target £150
  • 10km: registration fee £22.50, fundraising target £70

For charity sponsorship places, to secure your entry, you’ll need to raise 50% of your full fundraising target no later than three weeks before your challenge. You’ll get lots of support and reminders from us to help you achieve this! The remaining sponsorship can be sent to us in time for your event (or no later than four weeks after your challenge).

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.

  • 50km: registration fee £139, no fundraising target
  • 24/25km: registration fee £89, no fundraising target
  • 10km: registration fee £39, no fundraising target

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

The Ultra Challenge website has full details of the event. You can get in touch with the Ultra Challenge team for specific event questions at: info@actionchallenge.com

Dementia UK is proud to be an official Partner of the 2025 Ultra Challenge Series.

North downs ultra logo

Ari, fundraising for Dementia UK

The walk was both emotionally and If I could do something to raise awareness and help other families then I was proud to of completed this challenge in 12 hours. It was a tough walk, but the pain was worth everything and I would do it again just to support more wonderful charities.

Arti, who completed the Thames Path Ultra Challenge 2022