The Blenheim Palace Triathlon consists of two race categories; super sprint and sprint.

The Super Sprint race consists of a 400m swim, 13.2km bike ride, and a 2.9km run.

The Sprint race consists of a 750m swim, 19.8km bike ride, and a 5.4km 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.

Bloodwise are our title sponsor and you can raise money to assist the fantastic work they do to fight cancer. You can sign up with a ‘Bloodwise Charity Place’ which means you agree to raise a minimum amount of £350. Please note if this is not met you may lose your place in the race.

If you prefer you can register through the general entry places and still agree to raise money for Bloodwise, however, you have no obligation to meet a minimum target.

However, it is not compulsory to raise money for them or any other charity. Instead you can enter through the general places which means you are guaranteed a place but not obligated to fundraise for Bloodwise or any other charity.

Our official charity is Bloodwise but you are welcome to raise money for any charity that is close to your heart.

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 official 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 general relay is only available on Saturday – the corporate relay takes place on Sunday)
  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 2018 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, 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, third party insurance and BTF day licence only.

The BTF day licence is a licence for racing and covers your public liability insurance for the day. The cost of the day license is contained in the entry fee. 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; info@theblenheimtriathlon.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 on our official website two weeks prior to the event.

As per the withdrawal policy you can transfer your place to another race category subject to availability.

If you are unable to participate and it is more than 42 days out from the event you can transfer your place to another participant for a fee of £10.

In order to make any changes to your entry please login in to myevents.active.com

The Bloodwise Blenheim Palace Triathlon is a sell-out event but you can change your race category up to 6 weeks prior to the event weekend through myevents.active.com.  However, once wave allocations have been made it is not possible to change your start time.


If you are unable to race and need to withdraw from the event you have three options.

  • 14 days from the day of entry:

Participants are legally allowed to withdraw from the event and receive a full refund.

  • More than 42 days (6 weeks) out form the event day/ weekend:

Participants are able to transfer their place to another participant providing they pay a £10 transfer fee through myevents.active.com.

  • Less than 42 days from the event day/ weekend:

Place is lost and it is not possible to transfer to another person.

The following extenuating circumstances (based on supplying sufficient documentation) would enable participants to withdraw less than 42 days out form the event.


Pregnant women

Service men and women: if they are being deployed overseas during the event period.


Your race pack will be ready and waiting for you to collect at the event, please check our website for your start time.

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 perchase 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 despatched after the event.


For event specific accommodation information please visit the Blenheim Palace website.

You cannot camp or park overnight in the Palace ground and will be asked to leave by security should you attempt to do so.

You can get to Blenheim Palace for the event by car or public transport. If you visit the ‘Getting There’ page on our website you can find all of the relevant information to get you to the Palace 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

The race number is used for the cycle and run elements of the race. The number goes on your back for the cycle and on the front for the swim. This can be attached with safety pins, however, it is recommended to use a race belt. You simply attach your number to the race belt and then put the clip it around your midriff. It can then be moved to show the number on your back for the bike and on the front for the run.

The bike number stickers are placed on the front of the bike and the top of your helmet which serves two purposes.

  1. To ensure you are taking the correct bike out of transition
  2. You can be identified on our official photos which you may wish to purchase

Your wristband needs to worn to get you in and out of transition. Without this you cannot gain access to this area.

Wetsuits are compulsory for this triathlon for the safety of our participants. Your wetsuit will keep you warm and improve your swimming speed; a wetsuit provides you with extra buoyancy and the higher you are the faster you swim.

Your wetsuit must be a neoprene and we recommend a full body wetsuit, it can be a ‘shorty’

Nudity is not allowed in the transition area therefore, you should ensure you wear whatever you feel comfortable in for the run and the cycle.  Most triathletes will wear a tri suit as this can be used for the swim and the cycling element of the race.

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.

Backstroke is not allowed, as this can be confused with our distress signal. We recommend that you try to swim front crawl but breaststroke is also permitted.

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.

Your helmet will pass the safety inspection as long as it has no cracks in it, has no damage to it and bears a CE & EU safety mark inside it. The strap must also be in good working order.

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 upon 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 blen_tri_queries@raceahead.net

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


If you’d like to volunteer and be #partofthecrew please complete this form.

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.

Related Pages