Centurion Triathlon

The event is organised by Active Training World

icon Event

Sunday June 30th 2019

Anybody over the age of 19 can enter this triathlon.

Online entries: Pay by major credit/debit cards


The official charity of the Centurion Triathlon is the Triathlon Trust.

The Centurion trtiathlon is supported by Energy Snacks, High 5 and Moveology.

If you would also like to support this race then contact us at


icon Registration

Race numbers and timing chips will be collected at Stanborough Lake. Details about registration will be available closer to the event date.

Detailed race notes will be sent out two weeks before the race and will also be posted on this page. 

icon Event Profile

Event Name

Centurion Triathlon

METRIC Race Distances

Swim: 2km
Bike: 82km
Run: 16Km

IMPERIAL Race Distances:

Swim: 1.25 miles
Bike: 83.75 miles
Run: 15 miles


The swim is in Stanborough's southern lake, the bike course is undulating and the run features mixed terrain.  


Swim: 1 hour 30 mins
Bike: 7 hours (cumulative)
Finish: 10 hours 30 mins (cumulative)


Yes, minimum 2 athletes, maximum 3 athletes.


Food and water will be provided at feed stations on the bike and run course and at the finish.


Swim: No
Bike: No
Run: Yes










a) The higher of a £1 / 6% service fee will be applied at the checkout.
b) A £5 BTF licence fee is payable on the morning of the race for non-BTF members.


icon Prizes

Medal & polo shirt for all finishers

Overall 1st, 2nd, 3rd male and female trophy and prizes

Overall 1st Relay Team trophy and prizes

Age group trophy and prizes in in BTF 10 year bands for fastest male and female in each age group

icon Course Information

The race starts and finishes in the same location at Stanborough Lakes in Welwyn Garden City

You’ll need all your armour for the swim, which is two laps of the Stanborough Park amphitheatre for both events.

Helmets in place, Imperial and Metric combatants will follow the same bike course, but those tackling the longer distance will complete four rather than two laps.

You will complete a partial lap of Stanborough lakes park and out into the eastern boundaries of your empire. You will recieve all the encouragement you need from the citizens of Welwyn before returning home. However the relief is short lived, as your fate will be sealed with one or more repetitions before you can be named a Centurion. 

Swim Course Map

Bike Course Map | GPX FILES

Run Course Map

icon Training Plans

ActiveTrainingWorld have free training plans to help you train for this event:


Other Race Information

Race Start
Wave start times and swim times will be available closer to the event date. The race briefing is compulsory before the start.

Parking and Toilets
A pay and display car park is available at Stanborough Lakes. Toilets will be provided at race HQ and out on the course.

BTF rules
All competitors must comply with BTF rules. We strongly recommend that you read them HERE. Only competitors wearing their ID will be allowed in or out of the transition area.

BTF licence fee
A £5 BTF licence fee is payable on the morning of the race for non-BTF members. BTF members must produce their license at registration or a £5 levy will be charged.


By entering this event you agree to the below terms and conditions

Your details will be passed onto the event organisers Active Training World for the administration of the race.

Your name, date of birth and email details will be passed onto the chip timing company. Personal details will be deleted 1 week after the event.

Where specified on the booking form any medical information will be passed onto the medical team present at the event. 


I understand the following cumulative cut off times apply for this event and that faliure to meet these cut-off times will mean you will be unable to move onto the next stage of the race.

Swim: 1 Hour 30 mins

Bike: 7 Hours

Finish: 10 Hours 30 mins

DECLARATION: I declare that I am medically fit to compete & understand that I do so entirely at my own risk. I understand that I enter the race at my own risk and that no person(s) or organisation(s) will be held responsible for any accident, injury or loss to myself, prior to, during or after the event. I understand the organisers reserve the right to alter the arrangements and conditions should circumstances require.

LOCATION: Stanborough Lakes, Welwyn Garden City, Hertfordshire, AL8 6DQ

Location: Stanborough Lakes, Welwyn Garden City, Hertfordshire, AL8 6DQ