2-3 August 2025
|
London
Following the sell out of our 2024 event, join thousands of athletes from around the globe in one of the largest and most iconic triathlons in the world! The London T100 Triathlon offers a unique and unforgettable, closed-roads racing experience through the iconic city centre. A feeling that you won’t find anywhere else.
London T100 Triathlon 2025
Register your interest
Pre-sale for London T100 2025 is now closed – entries will go back on sale soon. 2024 was a sell-out event with over 4,000 participants, so get your name on the list to be first to hear when entries reopen!
Be The First To Hear!
"*" indicates required fields
Join the races
iNDIVIDUAL triathlon
Take on the 100km distance: 2km swim, 80km bike and 18km run or choose from one of our other event distances – all with famous London landmarks as the backdrop to your race.
Triathlon
100km
Swim
2km
Bike
80km
Run
18km
Triathlon
Olympic
Swim
1.5km
Bike
40km
Run
10km
Triathlon
Sprint
Swim
0.75km
Bike
20km
Run
5km
Team Relay
Take on the Olympic and Sprint races as part of a team. Challenge yourself and bond with your teammates while creating unforgettable memories in one of the world’s most iconic locations!
Triathlon
Olympic
Swim
1.5km
Bike
40km
Run
10km
Triathlon
Sprint
Swim
0.75km
Bike
20km
Run
5km
Course Maps
2024 course information. 2025 courses subject to change.
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 swim will set off in a rolling start format from the start pontoon located just outside the Excel Centre.
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.
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.
What's included
THE
T100
EXPERIENCE
The London T100 Triathlon offers an experience like no other, including free finisher’s pictures to commemorate your achievement, a SWAG pack filled with items like a duffel or drawstring bag, cap, and mug, as well as a medal to celebrate your success. Additionally, participants enjoy the safety and exhilaration of racing on closed roads.
What to expect
GLOBAL RACING
Like in 2024
You’ll be joining thousands of athletes from around the globe in one of the largest and most iconic triathlons in the world!
Event Location
London
Feel the rush as you pass by the Tower Bridge, the London Eye, and other unique landmarks, all while being cheered on by enthusiastic crowds lining the route.
FAQ
Learn more about London T100 Triathlon. 2025 information subject to change.
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.
WHEN WILL I NEED TO RACK MY BIKE & COLLECT MY RACE PACK?
T100 and Olympic participants will be required to rack their back and pick up their race back the day before the event.
Participants in the Sprint distance are strongly encouraged to collect Race Packs and rack bikes on the day before, but also have the option of doing this on the day of the event.
DO I NEED A WETSUIT?
Wetsuits are mandatory for all swimmers.
CAN I BRING A DOG TO THE EXCEL?
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]
WILL THERE BE A BIKE MECHANIC?
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.
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.
WHAT IS THE NEAREST STATION TO EXCEL?
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.
WHERE CAN I PARK?
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.
CAN I TAKE MY BIKE ON PUBLIC TRANSPORT?
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.
CAN I ARRIVE BY CAR?
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.
EVENT PARKING
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 for more information.
WHAT IS THE POST CODE?
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
WHAT'S IN MY RACE PACK?
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.
HOW DO I REGISTER MY RELAY TEAM?
If you are competing in the Olympic Team Relay the team captain will pick up your race pack on Saturday 27th July. If you’re competing in the Sprint Team Relay the team captain can pick up your race pack on Saturday 27th or Sunday 28th July. The bike numbers must be correctly attached to the bike and helmet to be used by the cyclist. 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, the timing chip will be an ankle chip.
BIKE RACKING
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.
RACE DAY CHECKLIST
– 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
DO I HAVE TO WEAR A WETSUIT?
Yes, wetsuits are compulsory for all participants.
IS THE SWIM A MASS OR PULSE START?
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.
SWIM SAFETY INFORMATION
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.
CAN I DRAFT DURING THE CYCLING LEG?
No drafting is allowed i.e. taking shelter behind or beside another competitor during the cycling leg of the race.
DO I NEED TO REMOVE MY WETSUIT AFTER THE SWIM?
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. To help us resource this appropriately please let us know in advance if you plan to use this by emailing us – [email protected] before the 12th July.
CAN I LEAVE MY BAG SOMEWHERE?
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.
CAN I BRING A DOG?
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]
WATER QUALITY INFORMATION
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.
SWIM - RACE RULES
The swimmer must wear the timing chip on their ankle and should do so under their wetsuit. When they exit the water they make their way to the Swim-to-Bike Relay Tent which is on entry to the transition area and will be clearly signed. This is where they will meet their cyclist teammate 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.