- Sat 1 Aug 2026
10:00
Age 8 & over
£49
- 10 km trail running + 233 m ascent
Event overview
Thousands of runners and walkers have taken part in the North Downs 50 Ultra Challenge - part of the UK’s biggest and best series of treks and trail runs for a wide range of ages, fitness and experience levels which raises £10+ million a year for charities!
You’ll get a fully signed route with arrows, free snacks and drinks, a t-shirt, medal and glass of fizz to make your active fundraising challenge successful and rewarding! If you’re up for a 10K charity challenge this year, make it the Guildford 10K!
The Guildford 10K Experience
The Guildford 10K is fun, safe, and rewarding and you can take it on at your pace as an individual, or as a team of friends or family. It's ideal as a charity fundraiser and children are welcome too. You’ll get full support, there’s a discounted finishers meal – and you’ll enjoy a great day out!
Get Sponsored for Charity
You’ll be amazed how much you can raise as friends and family will recognise and support your courageous endeavours! All fundraising goes directly to your charity via an online JustGiving page.
£10+ Million Fundraising
This 10K is part of a series which raises £10+ million a year for charities. Choose your charity, set up a JustGiving sponsorship page and make your miles count!+
Prefer to enter directly? General entry options are explained on the Guildford 10K page.
Event photos
Event video
Charity places
The charities below have places in the event. To secure your charity place, simply find a charity then book a charity place or join a charity team with your own place.
- Average fitness
- Beginner-friendly
- Event village
- Families
Your challenge, your way
Whether you’re a walker and new to challenge events, an experienced trekker, a marathon enthusiast upping the distance, or a seasoned ultra runner, there’s an Ultra Challenge® for you! Walk, Jog, or Run at your pace, as an Individual or a Team, for a charity of your choice or just for you.
There’s a new Ultra Trailblazerz® option for ‘rapid runners’, and an Ultra March® option for ‘hasty hikers’, plus a friendly ‘Solo Challenger’ start time to join up with others. The North Downs 50 Ultra Challenge® is fun, safe, and rewarding, with full support all the way, enabling you to push yourself further in wonderful Surrey scenery, and enjoy a great day out!
Best support & hospitality
This Ultra Challenge® famously lays on the best support and hospitality available on any UK endurance-style event. This enables you to step up and confidently tackle an 'Ultra' distance, with the best chance of success - and to enjoy your challenge!
- 1 lap
- Distance markers
- First aid
- Marshals
- Sweeper
- Undulating
- Way markers
Overview
A beautiful 10km looped route from the basecamp at Surrey Sports Park. The route explores public footpaths within Littleton past Loseley Park. You’ll be rewarded with a medal, a glass of fizz and a discounted hot meal to celebrate your achievements.
Map
At the finish
Bookable finisher’s meal, glass of fizz, medal and t-shirt.
- Bag transfer
- Bar
- BBQ
- Cafe
- Camping
- Changing facilities
- Entertainment
- Free parking
- Music
- Park
- Rural
- Secure bag storage
- Showers
- Toilets
- Fundraising materials
- Fundraising support
How to start fundraising
You need to create your fundraising page on JustGiving within 48 hours of registering for your challenge. Then you can start your fundraising by sharing your page online with your friends and family.
Fundraise as a team
As long as you’re all fundraising for the same charity, you can create a team fundraising page on JustGiving. You will still have to reach the combined total fundraising amount as the target is per person, not per team.
Fundraising concerns
Speak to your charity about any worries. They are the experts and will offer you support, materials and inspiration throughout.
Remember only 50% of the target has to be reached 3 weeks before the challenge meaning you’ve got time after the challenge to impress everyone with your achievement and keep on fundraising.
Help for you
If you don’t reach the fundraising target, there are alternative options. You can always change to a self-funded place and still take part in the challenge.
Next steps
Once you've got your charity place, your details will be passed to the charity and you will hear from them within 14 days.
I cannot thank everyone enough for their personal support and unlimited energy. 5★★★★★ and 10/10 in all my experiences.
For my first event, I was amazed at how well-organised it was. Particularly as I was on my own. Very well signposted. Excellent medical assistance. Very friendly crew. Fab event!
- Camping
- Drinks
- Fizz at the finish
- Map
- Medal
- Post-race meal
- Snacks
- T-shirt
Before
- Challenge app
- Facebook forum
- Training guides
- Fundraising support
- Training walks and runs
- Video briefings
- Travel planning
- Parking
During
- The start line
- Timing and GPS tracking
- Rest stops
- Medical support
Along the route
- Fully signed route
- Apps, maps and GPS
- Route safety experts
- Emergency response
- Trek masters
- 24 hour control room
After
- Finish line experience
- Finish times and certificate
- Shuttles and transfers
- Medical care and follow up
- Deals on future challenges
Bookable extras
- Finishers meal
