Thames Bridges Trek

Sat 13 Sept 2025

Join the Bright Horizons Team along with 2500 walkers and trek 25 km across the Capital with unrivalled views of the skyline & landmarks – all in support of the Bright Horizons Foundation for Children. 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 charity – do it at your pace, and there are 20 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 a member of the Bright Horizons Team. 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!).

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 >>

  • 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).

SIGN UP NOW

Click the button below to sign-up. Your Registration 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).

Bright Horizons employees benefit from significantly subsidised registration fees, while friends and family of Bright Horizons (clients, suppliers, parents, carers, friends and family) receive a 5% discount on their entry fees.

Discounted rates are subject to minimum fundraising targets being achieved and are outlined below. Use the appropriate labelled button below to register.

REGISTRATION DEADLINE – 20th August ’25 AT 12:00PM

STAFF

SELF FUNDING

Pay for your place & achieve your fundraising target. Staff ONLY to sign up via this link.

25km CHALLENGE

£33.82 Fee paid online &
fundraising target £250

10km CHALLENGE

£14.82 Fee paid online &
fundraising target £150

Friends & Family

SELF FUNDING

Pay for your place & achieve your fundraising target. Create your JustGiving below.

25km CHALLENGE

£84.55 Fee paid online &
fundraising target £250

10km CHALLENGE

£37.05 Fee paid online &
fundraising target £150

  1. Sign up to the challenge, using the ‘Sign Up ’ button on your chosen distance.
  2. Once you’ve completed your personal details, you will get to choose if you want to Create A New Team or Join An Existing Team as part of the registration process. 
  3. To Create A New Team – you must choose a team name, and a password – this password will be required by your fellow team members to join your team as they register. 
  4.  Once you’ve created your team, and completed your registration, your fellow team members can then sign up to the same challenge, and will need to select Join An Existing Team – entering your team name using the search bar, and the password you chose when you created the team.
  5. As a Team Captain you will receive an email notification each time someone joins your team.

  1. Sign up to the challenge, using the ‘Sign Up ’ button on your chosen distance.
  2. Once you’ve completed your personal details, you will get to choose if you want to Create A New Team or Join An Existing Team as part of the registration process. 
  3. To Join An Existing Team – search for the team you wish to join, you will need the password created by the team captain in order to join a team. 
  4. The team captain will be emailed a notification of your request to join the team, once they’ve accepted your request, you too will receive email confirmation that you are now part of the team.

OFFICIAL FUNDRAISING PARTNER

Want to join the Bright Horizons team on another event? Check out the Bright Horizons Calendar!

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. (NOTEIf 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:

HELP CENTRE >>

If you still need additional help or guidance – you can contact the Ultra Challenge Team at:

info@ultrachallenge.com

Tel: 0207 609 6695

 

Read the 2025 Terms & Conditions

18 Amazing Challenges

200,000+ adventurers have done an Ultra Challenge®, and the 18 events make up the UK’s NUMBER 1 SERIES of Treks & Trail Runs – which have raised over £60 million for UK charities. Whichever challenge you choose, you’ll get full support & hospitality 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®

Map

Lake District Ultra Challenge

7-8 June 2025

100 km loop + Half  + Marathon + Quarter Challenge options & Ambleside 10K

FULL DETAILS >

1 of 17

Isle of Wight Ultra Challenge

3-4 May 2025

106 km ‘Full Island’ Loop + Half & Quarter Island options AND  ‘Cross Island’ & Medina 10 Mile challenges.

FULL DETAILS >

2 of 17

London 2 Brighton Ultra Challenge

24-25 May 2025

100 km + Half, Marathon & Quarter Challenge distance options + Brighton 25 km Loop!

FULL DETAILS >

3 of 17

South Coast Ultra Challenge

6-7 Sept 2025

100 km + Half & Quarter Challenge options

FULL DETAILS >

4 of 17

Jurassic Coast Ultra Challenge

17-18 May 2025

100 km + Half & Quarter Challenge options AND Marathon & Bridport 10K

FULL DETAILS >

5 of 17

Thames 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)

FULL DETAILS >

6 of 17

South West Coast 50 Ultra Challenge

2 August 2025

50 km Loop + 25 km & 10 km Challenge options

FULL DETAILS >

7 of 17

The Bath 50 Ultra Challenge

29 March 2025

50 km Loop + 25 km & 10 km Challenge options

FULL DETAILS >

8 of 17

Gower Peninsula Ultra Challenge

19-20 July 2025

100 km (fig. of 8) 50 km Loops (West & East) + Marathon + 25 km & 10 km Challenge options

FULL DETAILS >

9 of 17

Peak District Ultra Challenge

28-29 June 2025

100 km (Fig. of 8) + Half (loop) & Quarter Challenge options & The Bakewell 10 Mile. 

FULL DETAILS >

10 of 17

Cotswold Way Ultra Challenge

21 – 22 June 2025

100 km + 3/4 + Half & Quarter Challenge options. + Cirencester 10K

FULL DETAILS >

11 of 17

Chiltern 50 Ultra Challenge

27 Sept 2025

50 km Loop + 25 km & 10K Challenge options

FULL DETAILS >

12 of 17

North Downs 50 Ultra Challenge

12 July 2025

50 km Loop + 25 km & 10km Challenge options.

FULL DETAILS >

13 of 17

Easter 50 Ultra Challenge

Sat 12 April 2025

Windsor

50 km, 25 km, 0r 10 km Loops from racecourse basecamp.

FULL DETAILS >

14 of 17

London Summer Walk

23 August 2025

Marathon, Half Marathon, 10 km or 5 km looped routes – Woolwich Start / Finish

FULL DETAILS >

15 of 17

London Halloween Walk

Sat 25 October 2025

25 KM or 10 KM spooky looped route options. Start / finish – The Oval Cricket Ground ‘dungeon’,

FULL DETAILS >

16 of 17

NEW – 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.

FULL DETAILS >>

17 of 17
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