London T100 Triathlon 2025

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.

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

• Finisher’s medal
• Event swag pack - duffle bag (100km only), drawstring bag, mug, t-shirt and cap
• Free event branded swim hat
• Event race pack (inc race number, bike number, timing chip)
• Post-event hydration
• Free finisher pictures
• Stunning closed road course

Individual Tri - 100KM
Swim 2km
Bike 80km
Run 18km

Olympic Tri
Swim 1.5km
Bike 40km
Run 10km

Sprint Tri
Swim 0.75km
Bike 20km
Run 5km

• Take on the Olympic and Sprint races as part of a team - Relay available in Olympic & Sprint distances

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.

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

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.

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.