The London Triathlon consists of four race categories; super sprint, sprint, Olympic, and Olympic Plus.

The Super Sprint route consists of a 400m swim, 10km bike ride, and a 2.5km run.

The Sprint route consists of a 750m swim, 20km bike ride, and a 5km run

The Olympic route consists of a 1500m swim, 40km bike, and a 10km run

The Olympic Plus route consist of 1500m swim, 80km bike, and a 10km run

If you are not comfortable completing a full triathlon you can compete in a sprint relay which consist of three people completing a single leg of the race to make up an entire triathlon; for example one person carries out the swim, another the cycle and finally the third person completes the run.

You must be 17 years old or over, as of the 31st December of the year you are competing, to compete in the main triathlon.

We have a number of charities associated with the event but you are welcome to raise money for any charity that is close to your heart.

In order to do this you need to register through the general entries and then can fundraise separately to any official fundraising channel the event offers.

We recommend setting up a JustGiving page to assist with marketing and securing your funds.

All participants need to register online through our registration page which is accessible through our website.

In order to complete your registration there are four steps to follow.

Step 1: Select your entry type.

In order to do this you need to know the following information:

  1. The distance you wish to compete; Super Sprint, Sprint or Sprint Relay (the relay is only available on Saturday)
  2. The day you wish to compete; Saturday or Sunday
  3. The gender race you wish to compete in; male, female or mixed

Step 2: Complete the entry from questions

Once you have chosen your race category you need to complete the entry form questions and decide if you wish to purchase any of our Official 2017 event merchandise.

Step 3: Accept the T&Cs and sign the electronic signature

By accepting the terms and conditions you adhere to all of the policies of the event both on our registration software, Active, and our event itself.

In order to sign the electronic signature you need to type your name in the space provided.

Step 4: Pay for the event

You can pay for your place using a credit or debit card, including American Express.

We are an all-inclusive event and do our utmost to accommodate participants with disabilities.  Please contact our Customer Service Team, londontriathlon@limelightsports.com with a description of your disability. We will assess this and establish if it is possible to compete and what we require to make this feasible.

Your entry fee covers the staging of the event and third party insurance.

The BTF day licence is a licence for racing and covers your public liability insurance for the day. For further information on race licenses please contact the BTF directly www.britishtriathlon.org.

Each race category has a specific number of places and if this is full it will display ‘Sold Out’. Alternatively, if you cannot find the desired race category on the entry form please contact our customer service team who will be able to assist you; londontriathlon@limelightsports.com

We do not operate a reserve/cancellation list. We take into account the usual drop-out rate prior to the event.

To ensure you race with friends, family, and work colleagues you need to choose the same race category (including gender) and join the same team.

Our registration platform, Active Network, creates a profile for all participants. This enables you to view all of the events you have registered for on Active, both past and present. You can access this by visiting myevents.active.com.

Once there you can make any relevant changes to your personal details and the event registration from. All changes must be made prior to the our first set of participant data beings end to our fulfillment company, 6 weeks prior to the event weekend.

Start times and wave allocations can be found in two specific locations:

  • On our official website two weeks prior to the event
  • In your race pack which is delivered no later than two weeks prior to the event

As per the withdrawal policy you can transfer your place to another race category subject to availability. In order to make any changes to your entry please login in to myevents.active.com. Please note, you can only change this up to 6 weeks prior to the event weekend.

We do not change wave start time unless it is in an extreme situation. We manage each request on a case-by-case situation, please email londontriathlon@limelightsports.com for assistance.


Unfortunately we cannot offer any refunds or transfer places to next year. There are a great deal of costs involved in staging an event of this proportion, such as paying for staffing, infrastructure, road closures and medical cover, all of which aren’t recoverable.

As stated in the terms and conditions, there will be absolutely no refunds. 


Your race pack will be sent out to you prior to race day. This will cost a mandatory £4.95 postage fee on top of your entry fee.

Your race pack will contain your race information guide, race number, bike and helmet stickers, transition wristband, and your welcome letter with your wave start time.

If any of the items listed above are missing please come to the Help Desk on the day of the event and our friendly customer service team can issue new items.

You will receive your swim cap at Swim Assembly on the day of your race.


All clothing merchandise will arrive around mid-May. We are unable to accept any merchandise refund requests placed after March as the orders would have already been sent to our merchandise supplier.

You can purchase any merchandise in the lead up to the event even if you have already registered for the event. In order to do so please go to your profile page at myevents.active.com.

iTab medal inserts ordered at point of entry will be dispatched after the event.


For event specific accommodation information please visit the ExCeL Centre website. 

The ExCeL Centre is located in East London in the heart of the Docklands. You can get to the event by car or public transport, the nearest tube station is Custom House on the DLR line. If you visit our website you can find all of the relevant information to get you to the venue to ensure you arrive in time for your wave.

In order to set up in transition and be ready for your race we recommend that you arrive 90 minutes before the start of your wave. You then need to be at Swim Assembly point 20 minutes before your wave is due to take place, this is to ensure you have partaken in our safety briefing and have received your swim cap.

A wetsuit is compulsory and it is your responsibility to ensure you have one on race day. If you haven’t already done so, the easiest way to hire or buy a wetsuit for the day is to visit www.wetsuithire.co.uk. All wetsuits are made by Zone3, the event’s official swim partner and the world’s leading wetsuit manufacturer. The wetsuit will not only keep you warm, but will also help you swim faster as it provides you with extra buoyancy.

Wetsuits must be worn up to 25°C. Should the water temperature exceed 25°C wetsuits are not permitted and changes to the event may be made at the organisers discretion.

Surf and shortie wetsuits are allowed, but these are totally different to a triathlon specific wetsuit, which is designed for swimming and fits like a second skin.

We recommend that you wear a tri-suit, but it is not compulsory. Regular sports kit is fine over a swim suit.

No. You will be unable to hear other competitors or the marshals when you are wearing one and consequently pose a threat to others.

We conduct numerous tests right up to the race day itself to ensure that the water is safe to swim in.

You can use any stroke you desire except for backstroke as this replicates the sign of distress.

Tri bars (and handlebars) must be plugged and they must be secure. There is no requirement for them to be shorter than the brake levers unlike in the elite races.

Drafting is against the rules for all but the Elite Competitors. You must not take shelter cycling behind or cycle beside another competitor during the race. You can be disqualified from the race for drafting. The draft zone is a rectangle measuring ten (10) metres long by two (2) metres wide. The centre of the leading 2 metre edge is measured from the back edge of the back wheel.

For more detailed triathlon rules and regulations please click here or contact the British Triathlon Federation www.britishtriathlon.org

Water will be handed out on the run course and at the finish line. 

There will be no water stations on the bike course – it is your responsibility to ensure that you have enough fluid to keep yourself hydrated on the bike leg.


For instant results you can click on the website and click on the ‘track my runner’. This will enable you to see all of your live results and compare them to other competitors.

All results will be posted on our website at the end of each day of the event. Additionally, if you have provided a correct UK mobile number in your application, you will receive a text message with your result.

If you have any queries relating to your results, please contact our timing providers post event on lon_tri_queries@raceahead.net

Marathon Photos are our official photographer for the event. Please go directly to their website to retrieve your photos and further information.

Please contact the event organisers via email, londontriathlon@limelightsports.com, with a full description of the missing item and we will do our best to reunite you with the item

Please post your timing chip back to us at:

IMG Mass Participation Sports

Building 6. Chiswick Park

566 Chiswick High Road,


London W4 5HR

If we do not receive this you will be liable for the £20 cost of the chip.


If you’d like to volunteer and be #partofthecrew please email volunteers@limelightsports.com.

We couldn’t do our events without our incredible volunteers. Working at the UK’s most stunning triathlon is an incredible opportunity and an amazing weekend of sport.

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