London Summer Walk

Explore some of the capital’s lesser‑known areas with a scenic tour of the historic “gateway to London” along the eastern stretch of the Thames. The adventure begins beside the impressive Woolwich Royal Artillery Barracks—just a short walk from the Elizabeth Line, DLR, and Overground.

Choose from a full marathon‑distance loop heading right into the heart of London (with a brand‑new Ultra March category for those who want an extra challenge), a fantastic 25km loop taking in the sights of Greenwich, or a 10km route if you’re after something shorter and spirited.

Each route is steeped in history, packed with iconic views, and supported end‑to‑end with a lively warm‑up, great on‑course support, and a celebratory BBQ and bar at the finish. It’s the perfect active way to round off the summer!

Please check the London Summer Walk website for the most up-to-date prices and special offer deals.

10km distance

• £20 registration fee
• £150 fundraising target

25km distance 

• £30 registration fee
• £275 fundraising target

Marathon distance

• £40 registration fee
• £375 fundraising target

Mixed funding

Pay 50% of the event place yourself and commit to a lower fundraising target.

10km distance

• £30 registration fee
• £100 fundraising target

25km distance

• £50 registration fee
• £150 fundraising target

Marathon distance

• £75 registration fee
• £225 fundraising target

To take part, you must raise the minimum sponsorship for your distance. We require half of your fundraising target 4 weeks before the challenge to secure your place. 

Please note these events are organised by Ultra Challenge.

As part of our team, you’ll receive:

• A Terrence Higgins Trust t-shirt to wear with pride
• Expert fundraising advice and unlimited support from our dedicated team
• Pre-event training guidance to help you prepare

On the day, you’ll enjoy:

• Rest stops with drinks and refreshments
• All meals and snacks included (depending on your chosen distance)
• Access to medics, massage services, and pace walkers
• A finisher’s medal, t-shirt, and a glass of bubbly to celebrate your achievement

Your support and fundraising help fund vital services including our one-of-a-kind sexual health helpline, HIV testing, counselling, and peer support programmes.

We are working to ensure that there will be no new HIV cases in the UK by 2030. Everyone living with HIV will be diagnosed, in treatment and care, free from stigma and able to take advantage of life’s opportunities.

Our dedicated fundraising team at Terrence Higgins Trust is here to support you every step of the way.

We ask that you consider whether you're confident in reaching the fundraising target before signing up.

Setting up a JustGiving fundraising page is quick and easy and all donations will come directly to us at Terrence Higgins Trust.

If sponsorship targets aren't reached, it can impact our ability to continue our vital work at Terrence Higgins Trust. It can even leave us out of pocket, as we pay a certain amount for each event space.

If you have any concerns about fundraising at any point, please don’t hesitate to contact us at [email protected]. We’re always happy to help!

Lace up those walking boots and trek to help us end new cases of HIV in the UK by 2030. To register or to find out more, visit the London Summer Walk website.

Please don’t forget to choose Terrence Higgins Trust as your charity when signing up!

Ultra Challenge events are for a wide range of fitness & ages – and UK’s #1 series of treks & trial runs. 

Choose your challenge – do it at your pace, and there’re 20 events in the UK series. Ultra Challenges support enables you to go further, whilst enjoying the great outdoors & camaraderie. 

There’re marquee rest stops, lots of food & drink, medical & massage teams, with a fully signed route & GPS tracking to guide you. 

A big finish-line celebration awaits with an amazing sense of achievement, and once the aches subside you’ll feel energised, and up for more of life’s real challenges! 

See all the 2026 Ultra Challenge events

Any questions or want to tell us you're signing up to a trek? Contact our Fundraising team.