#RedefiningTriathlon

LONDON T100 TRIATHLON
9-10 August 2025
Olympic Triathlon SOLD OUT! Final entries remaining across our other distances, join thousand of athletes for an epic multi-sport weekend in the Heart of London! Olympic Triathlon SOLD OUT! Final entries remaining across our other distances, join thousand of athletes for an epic multi-sport weekend in the Heart of London!

Event Info

Event Info: London

9-10 August 2025

General Info

Whatever distance you’re racing, you can look forward to a spectator-friendly swim in Royal Victoria Dock, an exhilarating bike leg on traffic-free roads in the capital, and a fast, flat run with amazing crowd support to complete your London T100 experience. We hope you have an incredible race!

Date

Saturday 9 August - Sunday 10 August

RACE DATES

9th August - Sprint, Super-Sprint Triathlon, & City AM Triathlon Team Challenge
10th August - 100km & Olympic Triathlon

Event Location

ExCel Centre
Royal Victoria Dock
London E16 1XL

Expo & Race Pack collection Location

ExCel Centre
Royal Victoria Dock
London E16 1XL

Terrain info

Swim

Dockland (Royal Victoria Dock)

Bike

Flat

Run

Flat

Avg. Water temperature

18°C - 21°C

Temperature

18-24°C

Courses and Location Maps

2024 course maps. 2025 course are subject to change.

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100 km Triathlon

Swim (2km)

The Swim

The London T100 Triathlon is set to take place in the iconic Royal Victoria Docks, a venue known for its rich maritime history and striking urban landscape. 

The freshwater 2km swim will set off in a rolling start format from the start pontoon located just outside the Excel Centre. Please make sure you arrive at the swim start area 20 minutes prior to your race start. 

T100 participants will complete two laps of the course and there will be no aussie exit or getting out of the water in between laps.

The Bike

The London T100 Triathlon bike course offers a dynamic and scenic ride through some of the city’s most iconic landmarks. For sprint and super sprint athletes, the cycling route loops around the vibrant Docklands area, providing a fast and exciting urban course.

Olympic and T100 athletes will  head out towards Big Ben. This extended route takes them past several of London’s most famous sites, including the London Eye, Tower Bridge, and the Tower of London.

This diverse course not only challenges athletes with its urban terrain but also offers breathtaking views of the city’s historical and cultural landmarks, creating a truly unforgettable cycling experience.

London T100 Bike

The Run

The London T100 Triathlon’s run course will take athletes alongside the scenic Royal Victoria Docks, close to the ExCeL Centre. This route offers participants a picturesque and invigorating experience, with stunning views of the water and the iconic London skyline. The course is designed to be flat and fast, ideal for both competitive runners and those looking to enjoy the unique atmosphere of this urban venue. Runners will benefit from the well-maintained paths and the enthusiastic support of spectators, ensuring a memorable and motivating end to the triathlon.

The run course will vary depending on the competition you are entered into. All T100 participants will complete 6 laps of the 3km course. 

For all other distances the course is 2.5km in length. Olympic distance participants will complete 4 laps, Sprint participants will complete 2 laps, and Super Sprint will complete 1 lap.

London T100 Run

Olympic Triathlon

Swim (1.5km)

Swim

The London T100 Triathlon is set to take place in the iconic Royal Victoria Docks, a venue known for its rich maritime history and striking urban landscape. 

The freshwater 1.5km swim will set off in a rolling start format from the start pontoon located just outside the Excel Centre. Please make sure you arrive at the swim start area 20 minutes prior to your race start. 

Olympic participants will complete one lap of the course.

London T100 Olympic Swim

The Bike

The London T100 Triathlon bike course offers a dynamic and scenic ride through some of the city’s most iconic landmarks. 

Olympic athletes will  head out towards Big Ben. This extended route takes them past several of London’s most famous sites, including the London Eye, Tower Bridge, and the Tower of London.

This diverse course not only challenges athletes with its urban terrain but also offers breathtaking views of the city’s historical and cultural landmarks, creating a truly unforgettable cycling experience.

London T100 Olympic Bike

Run

The London T100 Triathlon’s run course will take athletes alongside the scenic Royal Victoria Docks, close to the ExCeL Centre. This route offers participants a picturesque and invigorating experience, with stunning views of the water and the iconic London skyline. The course is designed to be flat and fast, ideal for both competitive runners and those looking to enjoy the unique atmosphere of this urban venue. Runners will benefit from the well-maintained paths and the enthusiastic support of spectators, ensuring a memorable and motivating end to the triathlon.

The run course will vary depending on the competition you are entered into. 

The Olympic run course other is 2.5km in length. Olympic distance participants will complete 4 laps.

London T100 Olympic Run

Long Duathlon

Swim (0.75km)

Swim

The London T100 Triathlon is set to take place in the iconic Royal Victoria Docks, a venue known for its rich maritime history and striking urban landscape. 

The freshwater 0.75km swim will set off in a rolling start format from the start pontoon located just outside the Excel Centre. Please make sure you arrive at the swim start area 20 minutes prior to your race start. 

Sprint participants will complete one lap of the course.

London T100 Sprint Swim Map

The Bike

The London T100 Triathlon bike course offers a dynamic and scenic ride through some of the city’s most iconic landmarks. For sprint athletes the cycling route loops around the vibrant Docklands area, providing a fast and exciting urban course.

Sprint athletes will complete two laps of the course.

London T100 Sprint Bike Map

run

The London T100 Triathlon’s run course will take athletes alongside the scenic Royal Victoria Docks, close to the ExCeL Centre. This route offers participants a picturesque and invigorating experience, with stunning views of the water and the iconic London skyline. The course is designed to be flat and fast, ideal for both competitive runners and those looking to enjoy the unique atmosphere of this urban venue. Runners will benefit from the well-maintained paths and the enthusiastic support of spectators, ensuring a memorable and motivating end to the triathlon.

The run course will vary depending on the competition you are entered into. 

For sprint athletes the course is 2.5km in length. Sprint participants will complete 2 laps.

London T100 Sprint Run Map

Venue Map

Spectator Viewpoints

Schedule

2025 event schedule. Schedule may be subject to change.

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7:00 AM

Venue Opens

Excel London

09:00 AM

10:10 AM

Sprint Triathlon Waves

Swim Start, Excel London

10:20 AM

10:30 AM

Super-Sprint Triathlon Waves

Swim Start, Excel London

12:00 PM

Pro Women Race Start

Excel London

14:45 PM

Pro Men Race Start

Excel London

05:00 AM

Venue Opens

Excel London

06:30 AM

7:15 AM

T100 Triathlon Waves

Swim Start, Excel London

8:30 AM

10:10 AM

Olympic Triathlon Waves

Swim Start, Excel London

Event Info & FAQs

2024 event info. 2025 event info subject to change.

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WHERE IS THE EVENT TAKING PLACE?

The event takes place in and around the ExCeL Exhibition Centre, Royal Victoria Dock, London E16 1XL, excel-london.co.uk. Please arrive 1.5 hours before your designated race start time.  

 

Due to these limitations and considering the number of competitors taking part in the triathlon we recommend that competitors with bicycles either cycle to the event or travel by car. 

 

Sprint & Super Sprint Triathlon – Saturday 9 August
Olympic Triathlon & 100km Triathlon – Sunday 10 August

The first waves will start at the following times:

 

Saturday 9th August

  • Sprint – 9:00 AM
  • Super-Sprint – 10:20 AM

 

Saturday 10th August

  • 100km – 6:30 AM
  • Olympic – 8:30 AM
  • Swim Docklands – TBC

Participants must be the following ages as of 31st December 2025 in order to participate:

  • 100km – 18 years old
  • Olympic – 17 years old
  • Sprint – 16 years old
  • Super-Sprint – 15 years old

Participants taking part in the T100 and Olympic distances MUST collect their Race Pack & SWAG items the day before their race. These timings will reduce queues, allow you to enjoy the Women’s  & Men’s Pro Races on Saturday 9th August, and allow you to arrive at the venue on race morning with everything set and ready to go.

Sprint & Super-Sprint athlete must collect their Race Pack on Saturday 9th August, please aim to arrive TWO HOURS before your race start to avoid queues, give you adequate time to set up your bike and transition and enjoy a stress free race morning.

Participants taking part in the T100 distance MUST rack their bike with helmet on Saturday 9th August.

Sprint & Super-Sprint will rack their bikes on the morning Saturday 9th August. Please aim to arrive TWO HOURS before your race start to avoid queues, give you adequate time to set up your transition area and enjoy a stress free race morning.

Bike racking times for the Olympic distance is to be confirmed.

Yes, placing medals will be awarded for the top 3 male and female athletes in each age-group and gender for the 100km, Olympic and Super Sprint Triathlon. The top 3 male, female and mixed relay teams for the Olympic and Sprint Relay event will also receive a placing medal.

Top 10 men and women athletes of their specific Age-Group and gender in the 100km Triathlon will qualify for the Qatar T100 World Championships on
December 12-13 2025. More information on the T100 Age-Group World Championships can be found here.

Wetsuits are mandatory for all swimmers. Sleeveless and shorty wetsuits are permitted.

This year we have partnered with On Your Bike. To book your bike for the London T100 Triathlon pleased click through to their website HERE. Your bike will be delivered to the venue for collection. After the ride you simply hand your bike back to them at the event!

 

If you need any last-minute help with your bike, there will be bike mechanics in the Event Village. They will be able to perform basic safety checks and undertake simple repairs. Please note that participants must stay with their bike while it’s with the mechanic.

Your safety and security are our top priorities. That’s why we collaborate closely with the Metropolitan Police and a number of other agencies to implement a wide range of protective measures. These include visible elements such as professional security staff, random bag checks, sniffer dogs, and comprehensive CCTV monitoring. We also have additional behind-the-scenes procedures in place to ensure a safe environment at all times.

Athletes will need their Race QR Code in order to pick up their race pack. This can be found within your Confirmation Email or Race Dashboard. We recommend taking a screenshot of this so that it is ready and easily accessible when you arrive.

Your QR Code can be found within your London T100 confirmation email and race dashboard. Having trouble finding your QR code? Simply click HERE, select ‘My Registration’ from the toolbar, select ‘Click here to have your confirmation email re-sent’, enter your email address, and select ‘Send Email’ to have your confirmation email re-sent. You will be able to access your QR Code and Race Dashboard from there.

Please be aware that no dogs are allowed within ExCel London’s venue and therefore within the Event Village. If arriving by car, participants or spectators bringing a dog will be turned away at the access point to the car park or if travelling on foot at the entrance to the venue itself. 


Those attending with Guide or Assistance Dogs will be permitted access. If you are planning on bringing a Guide or Assistance dog to the event, please do contact us in advance to let us know at  [email protected] 

WHERE IS THE EVENT TAKING PLACE?

The event takes place in and around the ExCeL Exhibition Centre, Royal Victoria Dock, London E16 1XL, excel-london.co.uk. Please arrive 90 minutes before your designated race start time.  

We recommend that participants with bicycles either cycle to the event, take public transport or travel by car.

 

If you travel by public transport, please be aware of the restrictions in place and allow plenty of time for your journey, as you may have to queue to take your bicycle on trains, tubes and Docklands Light Railway (DLR) services.

There are two DLR stations: Custom House for events taking place in the west of the venue and Prince Regent for those taking place in the east. 

 

The following stations are nearest to ExCeL London:

• Custom House Elizabeth Line / DLR 0.5 miles from ExCeL

• Prince Regent DLR 0.1 miles from ExCeL

• Canning Town (Jubilee Line) 1.6 miles from ExCeL

• West Ham 1.8 miles from ExCeL

• Stratford 3.5 miles from ExCeL

 

Bikes are allowed on the Elizabeth line and DLR at weekends but are limited to a maximum of two bikes per set of doors. 

 

Plan your journey here.

For all London T100 Triathlon parking, please head to the east entrance of ExCeL.

When you arrive at the ExCeL car park, please have your Race Pack collection QR code ready to show to our event staff. This will be emailed to you in the week leading up to the event. There will be vehicle checks and security dogs.

If you are transporting your bike on a roof rack or if you have a high or wide vehicle, please use the parking spaces on the upper level. The parking spaces on the lower level have a height restriction of 1.9m. Please follow the direction of the traffic stewards who will be able to direct you accordingly.

Please remember if you rack your bike on Saturday, and you transport your bike via roof rack, you will need to return to the upper-level parking on Sunday to ensure you have no issues with roof clearance once you’ve picked up your bike after the event.

All parking at ExCeL is charged at a daily rate of £25 and must be booked in advance via the

ExCeL website. Visit the ExCeL website for more information.

Bikes are allowed on the Elizabeth line and DLR off-peak and at weekends but are limited to a maximum of two bikes per set of doors. The Elizabeth line is now running on Sundays but please be aware of the limited number of early morning services.

Participants and their supporters should use the car parks at the eastern end of the ExCeL Centre which can be accessed via Royal Albert Way from Gallions Reach Roundabout via Royal Docks Road (A1020) from Newham Way (A13) and The North Circular (A406). These roads  will be busy on event day because of the road closures in place so allow sufficient time for your journey.  

 

Please plan your journey before travelling as roads will be closed for racing on Saturday & Sunday.

For all event parking please navigate to the east entrance. If you are transporting your bike on a roof rack or if you have a high or wide vehicle, please use the parking spaces on the upper level. The parking spaces on the lower level have a height restriction of 1.9m. Please follow the direction of the traffic stewards who will be able to direct you accordingly.  

All parking at ExCeL is charged at a daily rate of £25 which should be pre-booked online via the ExCeL website. Visit the ExCeL website here for more information.   

Please use E16 1FR if you are using a sat nav system. Please note access to the car park under the venue is only via Royal Victoria Dock Road or the A112

WHEN DO I HAVE TO REGISTER AND RACK MY BIKE?

Participants taking part in the T100 MUST collect their Race Pack, and rack their bike with helmet, the day before their race. These timings will reduce queues and allow you to enjoy the Women’s  & Men’s Pro Races on Saturday 9th August.

Race pack collection times for the Olympic, Sprint and Super Sprint are to be confirmed.

You must have the following items to collect your race pack:

  • Photo ID
  • Your Race QR Code
  • Proof of Triathlon License (only applicable to British Triathlon members)

Your QR code can be found within your Confirmation Email or Race Dashboard. We recommend taking a screenshot of this so that it is ready and easily accessible when you arrive.

Your QR Code can be found within your London T100 confirmation email and race dashboard. Having trouble finding your QR code? Simply click HERE, select ‘My Registration’ from the toolbar, select ‘Click here to have your confirmation email re-sent’, enter your email address, and select ‘Send Email’ to have your confirmation email re-sent. You will be able to access your QR Code and Race Dashboard from there.

Your race pack contains all the essential items for your race, and you will pick this up either the day before or on the day from the Registration area within the ExCeL South Halls.

 

SECURITY WRISTBAND: This must be attached to your wrist and not taken off until you have retrieved your bike from Transition after racing. This wristband will be numbered to match your race number. 

 

 

BIKE NUMBERS: Before the race, stick the three numbered stickers on your helmet (front, left and right) and the other around the seatpost of your bike. These should not be taken off until you remove your bike from Transition after racing. 

 

 

RACE NUMBER: Your race number must be displayed on your back during the bike phase and on your front during the run. We suggest you attach this to a race belt to give you the flexibility to switch race clothing and easily swap the number from back to front.

 

 

RACE TATTOOS: These are to be applied to your body, you can chose whether they are applied  to one on each arm or one on each leg or one on your arm and one on your leg.

 

 

TIMING CHIP: You must also pick up your reusable timing chip at chip collection within the registration area. In the preparation area, fasten your timing chip around your left ankle using the Velcro strap. Please do not remove your timing chip until you have completed your triathlon or you will not receive a result. We advise that you put your wetsuit over the timing chip strap. This will help to keep it secure in the water and prevents you from having to remove the strap in Transition. All timing chips must be returned once you cross the Finish Line – there will be a charge of £60 for any unreturned timing chips.

 

SWIM CAP: During the race pack collection process you will also receive a coloured swim cap. Please note that your swim cap may be a different colour to your race bib and wristband. Please ensure you keep hold of it for Sunday if you collect your race pack on Saturday. It is mandatory to wear the swim cap during the swim. 

Once you have collected your Race Pack, please enter the Transition Area to rack your bike. You will enter Transition at a designated entry point where staff will check your athlete wristband and make sure the stickers on your bike match to your athlete number.

 

Rack your bike in Transition in the position that corresponds with your race number. There will be signage at the end of each row that will have the number range for that row – find your numbers and rack your bike in that row. Volunteers and event staff will be on hand to guide you.

 

You can choose to place your swim-to-run transition kit safely under or next to your bike. Or you can wait until race morning to place it under your bike. Your helmet must stay in Transition with your bike once your bike is racked.

 

You may also lay out your bike gear (shoes, helmet, nutrition etc) under your bike to make your transition from swimming to biking more organised, which will result in a faster transition.

 

– QR code to collect your Race Pack

– Wetsuit (compulsory)

– Swimming goggles

– Bike and helmet

– Race belt with bib number

– Cycle shoes and running shoes

– Bike bottles

– Nutrition/snacks

– Sun cream

– Post-race clothes

– Towels

 

The T100 Athlete Tracker App is Available in all App Stores – it is a simple and easy way for your loved ones to track your progress and times during the race.

Yes, wetsuits are compulsory for all participants.

 

Please arrive at the Swim start queueing area 20 minutes prior to your race start. Once participants have checked into transition, they should make their way to the start area at least 20 minutes prior to their race start to join the back of the swim start queue. There a race briefing will be given to you by a member of staff. 

 

 

The queuing system will take you down to the dockside; where you will ‘walk’ into the water individually – one at a time. All waves will be pulse starts with participants setting off approximately every 2 seconds. 

 

For many, the swim is the most daunting part of the race, but don’t worry! Our water safety team will be there to guide you and help if required. Please identify yourself to our swim start team who can provide additional support and guidance should you need it. 

Please take your time entering the water via the pontoon ramp. Should you need a short time to acclimatise to the water temperature before you start swimming, please move slightly to the left to allow other swimmers to pass from behind. 

The team, provided by Swim Safety Ltd, consists of fully qualified lifeguards in kayaks and rescue boats as well as bank-based lifeguards on the pontoons. All lifeguards are members of either the BCU Lifeguards or Surf Lifesaving GB. If this is your first triathlon, or swimming is not your strongest discipline, we recommend that you position yourself towards the back of the wave. It may add a few seconds to your time, but it will enable you to get into your rhythm and enjoy the swim more. If you do get into difficulty, lie on your back and raise your arm in the air, a kayak will come to you and if necessary, arrange a safety boat to take you to the water’s edge. 

 

No drafting is allowed i.e. taking shelter behind or beside another competitor during the cycling leg of the race. 

 

 

The swim exit pontoon dips into the water so you can swim onto it before standing up. Lifeguards will be on hand to help you out if required. Once you have exited the water, you must remove your wetsuit before you re- enter ExCeL and climb the stairs back to transition. 

A wetsuit bag will be provided to you – please put your wetsuit, goggles and swim cap inside this. 

There will be a small changing area shielded from public view which is available for any participants who require this facility for religious or sensitivity reasons. 

We recommend that all participants and spectators bring with them a small bag containing only their kit. Bags will be subject to random bag searches upon arrival. There is no general bag storage facility on site outside of transition provision for participants only.

The water is tested against World Triathlon water quality standards; however, we would still advise you to be in good health and try to avoid swallowing the water in the docks. . Some swimmers may be more susceptible to infection through immune suppression. Swimmers are also advised that they MUST NOT swim with any open wounds. 

 

In open water swims there are no walls to push off every 25m, so practice swimming the race distance accordingly prior to race day. 

 

 NB: Wetsuits are COMPULSORY for all participants. Water temperatures will be monitored on the morning of the event and if it is deemed too hot to wear your wetsuit due to the water temperatures we  will inform participants at registration and participants should leave their wetsuits in transition. 

 

 

ENTRY REQUIREMENTS

All teams can contain 2 or 3 members. How each team decides to split each leg is up to them. For example, for a team of 2 persons they can either alternate legs or have one member does the first two and the other member does the last leg, or vice versa.

Yes, you can either confirm your team when you initially register or you can register yourself and then add your other team members at a later date.

You will have one timing chip that will act as a baton between team members and must be passed over to the next team member in Transition next to your transition rack.. Please note the timing chip will be an ankle chip.

The swimmer must wear the timing chip on their ankle and should do so under their wetsuit. When they exit the water they should make their way back to their numbered transition racking location.

 

This is where they will meet their cyclist team-mate to hand over the timing chip. The cyclist must attach the timing chip before they do anything else, then the cyclist can make their way to their racked bike and on to the bike course.

The cyclist must wear the big race number on their back. The cyclist must wait at their numbered transition racking location. Their bike must be racked at their numbered

racking location.

 

The swimmer will arrive at this location and pass the timing chip to the cyclist, who must attach it before doing anything else. Once the cyclist has attached the timing chip, they

can make their way onto the bike course. Upon completing the bike course, the cyclist must make their way back to their numbered bike rack and re-rack their bike.

The runner must wear the big race number on their front. They must wait at their numbered transition racking location. The cyclist will arrive and pass on their timing chip, which the runner must attach before they can continue to the run route. There will be a Team Relay Meeting Point 100 metres from the Finish Line, should teams wish to run into the finish together. This meeting point will be clearly signposted.

ENTRY REQUIREMENTS

All teams can contain 2 or 3 members. All participants must be part of the same organisation/company. 

All entries come with exclusive City AM Team Triathlon SWAG items priority package collection & priority bike check in. Plus pre and post race coverage on City AM channels. Each team will also have the opportunity to purchase exclusive hospitality from 11am at London’s Excel, including catering and food the opportunity to watch the world’s best professional triathletes race on Saturday from the VIP viewing areas.

Saturday 9th August.

How each team decides to split each leg is up to them. For example, for a team of 2 persons they can either alternate legs or have one member do the first two and the other member does the last leg, or vice versa.

Yes, you can either confirm your team when you initially register or you can register yourself and then add your other team members at a later date.

Yes, the members of top 3 teams will each receive a placing medal.

You will have one timing chip that will act as a baton between team members and must be passed over to the next team member in Transition next to your transition rack.. Please note the timing chip will be an ankle chip.

The swimmer must wear the timing chip on their ankle and should do so under their wetsuit. When they exit the water they should make their way back to their numbered transition racking location.

 

This is where they will meet their cyclist team-mate to hand over the timing chip. The cyclist must attach the timing chip before they do anything else, then the cyclist can make their way to their racked bike and on to the bike course.

The cyclist must wear the big race number on their back. The cyclist must wait at their numbered transition racking location. Their bike must be racked at their numbered

racking location.

 

The swimmer will arrive at this location and pass the timing chip to the cyclist, who must attach it before doing anything else. Once the cyclist has attached the timing chip, they

can make their way onto the bike course. Upon completing the bike course, the cyclist must make their way back to their numbered bike rack and re-rack their bike.

The runner must wear the big race number on their front. They must wait at their numbered transition racking location. The cyclist will arrive and pass on their timing chip, which the runner must attach before they can continue to the run route. There will be a Team Relay Meeting Point 100 metres from the Finish Line, should teams wish to run into the finish together. This meeting point will be clearly signposted.

REFUND POLICY

We understand that sometimes things just don’t go to plan! That’s why we have an industry leading refund policy to help you feel confident in signing up for our events.

Read the full refund policy here.

You can request a cancellation and refund directly through your Race Dashboard by following these steps:

 

  1. Head to your Race Dashboard – you can find the link in your London T100 confirmation email
  2. Scroll down to the ‘Registration Cancellation Request’ section
  3. Read the terms and provide a reason for cancellation
  4. Select ‘Submit Cancellation Request’
  5. Confirmation – Once complete, you’ll receive an email confirming the change and refund as the the cancellation timeline

No, you are not allowed to participate under another persons name to ensure full participant safety. Any person found racing under another persons name will be disqualified.

No, entries are non transferable.

Yes, You can update your race distance directly through your Race Dashboard by following these steps:

 

  1. Head to your Race Dashboard – you can find the link in your London T100 confirmation email
  2. Scroll down to the ‘Change Your Race Distance’ widget
  3. Select your new distance and choose the race you’d like to transfer into and click ‘Change Your Race Distance’.
  4. Complete the form and provide any updated information and review any additional costs (if applicable).
  5. Confirmation – once complete, you’ll receive an email confirming the change.

Race Pack Collection

This year, the Race Kit Collection will take place at the ExCel Centre.

Date

TBC

Location

Royal Victoria Dock, 1 Western Gateway, London E16 1XL

Race Expo Opening Hours

TBC

Spectators watch on at the London T100 Triathlon

DIVE INTO THE HEART OF LONDON

Join us for Swim Docklands at the iconic Royal Victoria Docks, where you’ll glide through open water with London’s stunning skyline as your backdrop. Choose between a 1-mile or 2-mile swim – perfect for both newcomers and seasoned open water swimmers.

Important Documents

Race Day Essentials - 2025 Guide

Your Complete Athletes' Guide

Dive into the details of race day preparation with our comprehensive Athletes' Guide. From logistical information to event schedules and rules, this guide provides everything you need to know to ensure a smooth and successful experience at the T100 triathlon.

Athlete Guide

Race rules

Wave Start Schedule

Race Expo Guide

Discover London

From historic landmarks to bustling markets, royal parks to modern skyscrapers, and traditional pubs to world-class dining, London offers you, your family, and friends an unforgettable experience with triathlon at its heart.

Nirvana Logo

Elevate your experience

T100 have partnered with On Your Bike. To book your bike for the London T100 Triathlon pleased click through to their website via the button below. Your bike will be delivered to the venue for collection. After the ride you simply hand your bike back to them at the event!

100km: The Ultimate Test

Whether you're new to tri or a seasoned competitor, the 100km distance is an endurance challenge like no other.

Unique T100 race pack with entry

Included with every triathlon entry is your Official T100 race T-Shirt, Race Bag, and much more.

Follow in the pros' footsteps

Join the global triathlon family and race on the closed roads just like the world's top professional triathletes.

A City Like No Other

A race in the heart of London – take on a course packed with iconic London landmarks.​

Qualify For Great Britain

The London T100 Olympic distance triathlon will be a GB Age Group Team Qualifier for the 2026 European Championship Standard Distance Triathlon. Further information on how to register your intent to qualify can be found HERE.

World Championship Qualification

Top 5 in each AG to Qualify and become the T100 AG World Champion

Swim Docklands at T100

This August, choose between a 1-mile or 2-mile swim – perfect for both newcomers and seasoned open water swimmers.

T100 Community

The T100 Community is your ultimate hub for all things swim, bike, and run! Connect with local training groups and triathlon clubs to find race runs, expert tips, and training support from fellow athletes.

Redefine Your Performance

Blending innovation, athletic excellence and sustainability

Contact Us

Need help or have more questions? Don't hesitate to get in touch.

[email protected]

Email address