Thames Bridges Trek
Sat 13 Sept 2025
- London - Thames
- Putney Bridge - Tower Bridge
- 25 km & 16 Bridges
- + New 'Thames 10K' option
- Walk Only
- Southwark Park Finish
- Food & Drink
- Friday Moonlight 10
Join 2500 walkers and trek 25 km across the Capital with unrivalled views of the skyline & landmarks – and you can fundraise for WWF (World Wildlife Fund). From a Putney Bridge start it’s East towards the City, zig-zagging over 16 historic bridges – each with a fascinating story – and a mid-point rest stop at The Oval Cricket Ground for snacks & drinks. 25 km later, beyond the majestic Tower Bridge, it’s a party style finish line celebration & afternoon picnic in Southwark Park. With a 10 km option – and a Friday evening ‘Moonlight 10’ also available – there’s a fabulous Thames walk for you!
The Ultra Challenge® Experience
UK’s #1 Endurance Style Events for ALL Experience Levels.
Choose your Challenge, support your favourite charity – do it at your pace, and there are 17 events in the Series with distance options to suit all! The ‘famous’ Ultra Challenge support enables you to go further, whilst enjoying the great outdoors & camaraderie. There are marquee rest stops, lots of food & drink, medical & massage teams, with a fully signed route 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!
Push Yourself Further in 2025
Good preparation & smart planning are key, and from the moment you sign up you’ll have access to our Challenge App – with training guides, optional training walks, maps, online forums, and the latest news & updates.
Rest Stops every ~12.5 km with ‘major’ ones every ~25 km, and are much more than the shaky gazebo with water that you see on some events. We’ve marquee cover, large medical & welfare tents, catering services, seating areas for recovery, changing rooms, and a friendly welcome!
There’re pink arrows to guide you, distance markers, glow-sticks at night, hazard signs, and a route map in the App. Our ‘Trek Masters’ organise group departures at night so nobody has to walk solo. Our chip timing system enables our Control Room, and your friends / family, to track your progress through the Rest Stops.
Keeping you well fed & hydrated is key. We pride ourselves on the quantity & quality of our catering, and meals, snacks & drinks are included!
- Snacks & drink stops every 12.5 km
- Snacks – from the healthy to treats
- Picnic at 25 km (for 50km participants)
- Energy drinks
- All dietary requirements catered for
- Lighter options for ‘runners’
- Finishers hot meal 50 km (picnic for 25km & 10km)
We’ve experienced Doctors, Paramedics, First Aiders, Podiatrists, and Massage Teams at Rest Stops. There’re ‘Self Help’ areas with blister plasters, talc, Vaseline, and tape if you want to patch your own feet. Our mobile Emergency Medical Teams are only a phone call away, via our 24 hour Control Room
We don’t want you to forget that finish-line moment – our Cheer Squad will ensure you won’t! You’ll get a medal, finisher’s T-shirt, and a glass of fizz, before heading to a BBQ and a well earned rest. Download your official Challenge certificate when you’re ready.
There’re shuttles to local train stations for onward travel, and most finish lines have parking so supporters can meet you. We’ve bus ‘transfers’ to / back to key venues (eg the start) – and check out the ‘Bookable Extras’ for details of all transport options.
Your Challenge
Your Way!
Whether you’re a walker and new to challenge events, an experienced trekker, an occasional walker, or just want a great day out in London – there’s a Thames Bridges Trek for you! Walk at your pace, as an Individual or a Team, for your favourite charity. Take on the full 25 km with 16 historic bridges, or head to the Oval Cricket Ground for the start of the NEW 10 km option. If you’re up for an active Friday evening – there’s also the ‘THAMES MOONLIGHT 10‘ – with a fun 10 km or 10 mile options – starting & finishing at The Oval. All these events are WALKING ONLY (no running!).
Check out which Challenge is for you….
25 km – flat route, as it follows the Thames! See Route Map below.
Start location: Bishops Park, Fulham
Start times: 10:00 – 12:00
Finish location: Southwark Park, East/ Central London
Finish times: 4 – 7 hrs (any finishers coming in before on a jogging/ running time will be disqualified)
Rest Stops – Our rest stops & finish line are fully supported with toilets, medics, event managers, crew & covered seating areas.
- 12.5 km (The Oval Cricket Ground) – pastries, fruit, snacks, & hot drinks
- 25 km – finishers picnic
10 km & flat! Walking only.
Start – The Oval Cricket Ground (easy to get to). Tea. coffee, snacks.
Start Time – 10.30 – 11.0 am Saturday 14th Sept
Route – follow the arrows! Crosses Millennium Bridge, Southwark Bridge, London Bridge and Tower Bridge.
Finish – Southwark Park, with a great atmosphere, celebration, medal, T-shirt, glass of fizz – and a picnic lunch.
Transport – good Tube links, both ends.
VIEW 10K ROUTE >>
Take on either a spirited 10 km or an energetic 10 mile looped route walk through the heart of London as darkness falls and the Moon rises. Experience London in a different light, passing famous landmarks – including St Paul’s, Westminster Abbey, Tower Bridge, the London Eye and more. A lively finish line awaits – with a glass of fizz & a special Moon medal – followed by some welcome hot food & drink.
FIND OUT MORE >
- There is no official parking at the start/ rest stop or finish
- Public transport options in all areas are plentiful
- Nearest Tube for the 25km start – Putney Bridge (District Line).
- Nearest Tubes for 25 km finish – Bermondsey, Canada Water, Surrey Quays
- The Oval Cricket Ground (start of 10km & Moonlight 10) – is served by Tube (Oval & Vauxhall) and overground (Vauxhall).
How to Join
Sign up online & pay a Registration Fee. You’ll get a confirmation email, which includes a ‘link’ to set up your online JustGiving sponsorship page. You’ll also get access to the ‘Challenge App’ which holds all the details about the event.
Choose how you want to join the Challenge – register via that option and its associated online form. Then enter your personal details.
- Option 1 – Sponsorship for Charity
- Option 2 – Mixed Funding for Charity
- Option 3 – Own Place Charity Fundraising
* A ‘Platform Booking Fee’ of 3% is applied to all event registrations.
Confirm the challenge distance and then select a provisional start time slot (actual start times are confirmed 4 weeks prior to the event, and for Teams – it will be as per the Team Captain’s choice)
Everyone has to register as we require personal details & declarations. Within the form you can choose to ‘Create’ or ‘Join’ a Team. Teams can be of any size – members can opt for the same or different funding options, charities, or distances.
- Create a Team – you become the Team Captain. You need a Team Name, and a Password for others to join. Then invite friends & family to join you!
- Others join the Team as they register, by searching for the Team Name & using the Password
- Team Start Time – is as per selected by the Team Captain
All sponsorship goes direct to the Charity via your online JustGiving page. At least 50% of the ‘sponsorship target’ should be with the Charity 3 weeks prior to the Challenge. At this time the Charity agrees to pay a Fee for your place to the Organiser (similar to the Self Funding cost – or half of it for Mixed Funding as you’ve already covered half).
Failure to meet the deadline may result in cancellation of your place by your charity.
The remaining 50%, and any extra, should be with your Charity by 4 weeks after the Challenge.
There’s a range of optional extras designed to make the planning for, and joining, your challenge easier. Sign-up to your chosen Challenge first – and you can then book any optional extras later / separately (see below for details).
Looking for a great event for your team without all the hassle, risk, or costs of organising it? These events are the PERFECT solution!
Your Team will be energised, exercised, bonding & motivated on a fun, accessible, safe, high quality outdoors event. With optional hospitality packages available – make an Ultra Challenge® your company’s special event in 2025 – supporting your ‘charity of the year’.
FIND OUT MORE >>
Get in Touch:
corporate@actionchallenge.com
Costs & Fundraising
Select your Option below to start the sign-up process. Reg Fees are paid online & Fundraising goes to the charity via an online JustGiving sponsorship page that you’ll need to set up (look for the link within the ‘Confirmation Email’ you’ll receive).
With ‘Full Sponsorship For Charity’ (Option 1) – the Reg Fees below are 50% OFF standard fees – as you’ll be fundraising for an official SERIES CHARITY PARTNER
Option 1
FULL SPONSORSHIP
FOR CHARITY
Pay a small Registration Fee & Fundraise for your Charity (who then pay for your place)
25km CHALLENGE
£30 Reg Fee & at least
£275 fundraising/sponsorship
10km CHALLENGE
£20 Reg Fee & at least
£100 fundraising/sponsorship
Option 2
MIXED FUNDING
FOR CHARITY
Pay for half your place cost & fundraise less for Charity (who pay half your place cost)
25km CHALLENGE
£50 Reg Fee & at least
£150 fundraising/sponsorship
10km CHALLENGE
£22.50 Reg Fee & at least
£70 fundraising/sponsorship
Option 3
OWN PLACE CHARITY
FUNDRAISING
Pay for your place & fundraise whatever you can (with no event place cost to them)
25km CHALLENGE
£89 Fee paid online &
fundraise whatever you can
10km CHALLENGE
£39 Fee paid online &
fundraise whatever you can
NOTE – Our registration system provider is Active Network – you’ll need to create an account, or log into an existing one as you register. All Reg Fees are paid online. A 3% Platform Booking Fee applies to all transactions.
FAQs
You must be 18 or over (on the day of the challenge) if taking on a Full Challenge (~100km) or Three Quarter Challenge (~75km); 16+ and accompanied by an adult if taking on a Half Challenge (~50km ), 14+ and accompanied by an adult if taking on a Quarter Challenge (~25km) or Marathon); for a Half Marathon aged 12+ and accompanied by an adult; and finally 8+ & accompanied by an adult for a 10km/mile Challenge.
Under 18s taking part must be signed up by someone over 18.
You’ll receive a ‘transaction receipt’ (via email) along with a Confirmation Email welcoming you, and detailing any next steps, timelines you need to be aware of, and how & where to find all the info / details you’ll need for your Challenge. (NOTE– If you don’t receive that e mail within 12 hours, please check your spam/junk mail folders)
You can expect to hear from your charity within 14 days. If for some reason you do not hear from them – please contact them directly, and also email us at charity@actionchallenge.com & we will follow up with the charity for you.
We ensure that registered teams are assigned the same start wave (where distance/challenge option allows), and your team name will be printed onto your bib.
There are no restrictions on our regular teams – you can be any mixture of charities / distances / funding types (i.e. Self Funding, Charity Sponsorship or Mixed Funding), and can have any number of members. (even 2).
Even if you are not fundraising for the same charity, you can still create a challenge team with us.
Whilst you are signing up and registering for your challenge – in the TEAM INFO section (towards the end of the registration questions), you will be asked if you would like to ‘Join a team’ or ‘Create a team’.
If selecting to create a team, you will be asked to create a Team Name and Password. Subsequent team members can then register and select to join your team, and will need to provide the team password in order to join it.
Yes – as long as you are fundraising for the same charity, you can create a team fundraising page on Just Giving (we recommend letting your charity know this is how you will be fundraising together). However, please be advised that the minimum fundraising targets remain per person (not per team), so you will need to reach the combined total fundraising amount on your page for your group.
If you are entering on a Charity Sponsorship or Mixed Funding place then NO – you must select one prime charity for your fundraising. This is because your charity will be paying for a portion of your place on the event (out of the fundraising that you generate). If you wish to also fundraise for another charity, you can do so on your own terms but only as long as you reach the minimum fundraising target your first/prime charity.
If you join as ‘Own Place Charity Fundraising’ however, you have complete flexibility on who you fundraise for – with no targets or deadlines.
All sponsorship goes direct to the Charity via your online JustGiving page – WHICH YOU MUST SET UP.
At least 50% of the ‘sponsorship target’ should be with the Charity 3 weeks prior to the Challenge. At this time the Charity agrees to pay a Fee for your place to the Ultra Challenge Organiser (similar to the Self Funding cost – or half of it for Mixed Funding as you’ve already covered half).
Failure to meet the deadline may result in cancellation of your place by your charity.
The remaining 50%, and any extra, should be with your Charity by 4 weeks after the Challenge.
All charity sponsorship and mixed funding places close 4 weeks before each challenge, so that you have enough time to fundraise and reach your target. Self funding places close for online registration on the Tuesday before each challenge.
Visit the ‘HELP CENTRE’ on the Ultra Challenge Website:
If you still need additional help or guidance – you can contact the Ultra Challenge Team at:
Tel: 0207 609 6695
18 Amazing Challenges
Over 200,000 adventurers have taken on an Ultra Challenge® so far, and the 18 unique events make up the UK’s biggest & best series of treks & trail runs – which have also raised £55+ million for charities. Whichever challenge you choose, you’ll get full support all the way so you can set a new goal, enjoy the British countryside, and Push Yourself Further! Whoever you are – If you’re up for a challenge, it has to be an Ultra Challenge in 2025.
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7-8 June 2025
100 km loop + Half + Marathon + Quarter Challenge options & Ambleside 10K
1 of 17Isle of Wight Ultra Challenge
3-4 May 2025
106 km ‘Full Island’ Loop + Half & Quarter Island options AND ‘Cross Island’ & Medina 10 Mile challenges.
2 of 17London 2 Brighton Ultra Challenge
24-25 May 2025
100 km + Half, Marathon & Quarter Challenge distance options + Brighton 25 km Loop!
3 of 17South Coast Ultra Challenge
6-7 Sept 2025
100 km + Half & Quarter Challenge options
4 of 17Jurassic Coast Ultra Challenge
17-18 May 2025
100 km + Half & Quarter Challenge options AND Marathon & Bridport 10K
5 of 17Thames Path Ultra Challenge
13 – 14 Sept 2025
100 km + 3/4 + Half & Quarter Challenge options & Henley 10K
+ Thames Bridges 25km Trek (Sat – Central London)
+ Friday Moonlight 10K Walk (Central London)
+ The Henley 10K (Sunday)
6 of 17South West Coast 50 Ultra Challenge
2 August 2025
50 km Loop + 25 km & 10 km Challenge options
7 of 17The Bath 50 Ultra Challenge
29 March 2025
50 km Loop + 25 km & 10 km Challenge options
8 of 17Gower Peninsula Ultra Challenge
19-20 July 2025
100 km (fig. of 8) 50 km Loops (West & East) + Marathon + 25 km & 10 km Challenge options
9 of 17Peak District Ultra Challenge
28-29 June 2025
100 km (Fig. of 8) + Half (loop) & Quarter Challenge options & The Bakewell 10 Mile.
10 of 17Cotswold Way Ultra Challenge
21 – 22 June 2025
100 km + 3/4 + Half & Quarter Challenge options. + Cirencester 10K
11 of 17Chiltern 50 Ultra Challenge
27 Sept 2025
50 km Loop + 25 km & 10K Challenge options
12 of 17North Downs 50 Ultra Challenge
12 July 2025
50 km Loop + 25 km & 10km Challenge options.
13 of 17Easter 50 Ultra Challenge
Sat 12 April 2025
Windsor
50 km, 25 km, 0r 10 km Loops from racecourse basecamp.
14 of 17London Winter Walk
25 & 26 January 2025
Marathon, Half Marathon, 10 km or 5 km looped routes – The Oval Start / Finish
15 of 17London Halloween Walk
Sat 25 October 2025
25 KM or 10 KM spooky looped route options. Start / finish – The Oval Cricket Ground ‘dungeon’,
16 of 17NEW – Kent Downs 50 Ultra Challenge
Sat 11 October 2025
50 KM, 25 KM or 10 KM looped routes options. Start / finish – The Kent Showground nr. Maidstone.
17 of 17