Setting out from a Guildford basecamp to the fabulous North Downs
A looped 50km route which takes in some of the best of the Surrey hills, the North Downs Way, and the surrounding countryside – with real variety, some wonderful scenery and fabulous views out to the south.
With 50km, 25km and 10km challenge options available, there's a challenge for everyone. You can join as an individual or as a team.
Event details
Saturday 01 August 2026
North Downs
Fundraising Options
Charity sponsorship
- Pay a small registration fee, do lots of fundraising and we cover the cost of your event place. As we are an official charity partner of the event you will get 50% off the registration fee.
- Registration fee: £15 - £40, depending on your chosen distance.
- Fundraising target: £150 - £375, depending on your chosen distance.
Mixed funding
- Pay half of the event place cost yourself, fundraise a bit less and we will pay the balance of your event place cost.
- Registration fee: £25 - £75, depending on your chosen distance.
- Fundraising target: £100- £225, depending on your chosen distance.
Own place fundraising
- Pay the full cost of the event place, fundraise whatever you can, with no set target or deadline.
- Registration fee: £49- £139, depending on your chosen distance.
- Fundraising target: Raise as much as you can
Visit the Ultra Challenge website for full details on distances, prices, and to sign up.
Why we need you
Great Ormond Street Hospital Charity (GOSH Charity) Charity needs your support more than ever. By fundraising, you'll help to fund:
- groundbreaking research
- advanced equipment
- children and family support services
- the rebuilding and refurbishment of wards and medical facilities within the hospital
Why trek for GOSH Charity?
As part of TeamGOSH, you'll receive:
A GOSH Charity t-shirt
Dedicated support from GOSH Charity's Challenge Events Team
Inclusive and fun event with a great atmosphere and camaraderie
A fully signed route, with a team of ‘Trekmasters’ out on the trail with you
Regular covered rest stops, with free food and drink, massages and medics
An epic finish line moment, with a glass of fizz, medal and t-shirt
Ready to trek for GOSH Charity?
Lace up those walking boots and trek for seriously ill children at Great Ormond Street Hospital