- Sat 22 Aug 2026
10:00
Age 14 & over
£89
- 25 km walking
Event overview
Thousands of adventurers have taken on the London Summer Walk or an Ultra Challenge® - 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 full support all the way so you can set a new goal, conquer the capital and push yourself over 25km for an important cause. If you’re up for a charity challenge event this year, make it the London Summer Walk!
The Ultra Challenge Experience
Walk at your own pace. The level of support enables you to go further. There are rest stops with food and drink, medical and massage teams, and a fully signed route to guide you.
A finish-line celebration with BBQ meal, bar and music awaits with an amazing sense of achievement for you personally and also for your fundraising efforts.
Get Sponsored for Charity
You’ll be amazed how much you can raise on these challenges as friends and family will recognise and support your courageous endeavours and significant mileage over half marathon distance! All fundraising goes directly to your charity via an online JustGiving page.
£10+ Million Fundraising
The series raises £10+ million a year for charities. Choose your charity, set up a JustGiving sponsorship page and make your challenge count!
Prefer to enter directly? General entry options are explained on the 25km 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.
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- Average fitness
- Beginner-friendly
- Event village
- Teams
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! Here's a summary:
- Check points
- Distance markers
- First aid
- Flat
- Food stations
- Marshals
- Toilets
- Water stations
- Way markers
Overview
From the basecamp start the route heads through the Woolwich Tunnel to Docklands. Along the Thames, through Canary Wharf and The Isle of Dogs. Back under the River via the Greenwich Foot Tunnel, past the Cutty Sark and a rest stop at the Old Naval College. Then along the Thames to the Greenwich Peninsular, past the O2, past the Thames Barrier, through Charlton, and back up to the basecamp in Woolwich, where a big cheer, medal, glass of fizz, T-shirts and BBQ meal await!
Map
- Bar
- BBQ
- Cafe
- Music
- Urban
- 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.
A great experience, which I thoroughly enjoyed, already looking to book again!
The whole experience of walking round London but with the sunrise over Tower Bridge was brilliant.
- Drinks
- Event app
- Fizz at the finish
- Map
- Massage
- Medal
- Post-race meal
- Snacks
- Training plan
- T-shirt
Before
- Challenge app
- Facebook forum
- Training guides
- Fundraising support
- Training walks and runs
- Video briefings
- Travel planning
During
- Chip timing and tracking
- Rest stops
- Food and drink
- Medical support
Along the route
- Fully signed route
- Apps, maps and GPS
- Route safety experts
- Emergency response
- Trek masters
After
- Finish line experience
- Finish times and certificate
- Hot meal
- Medical care and follow up
- Deals on future challenges
