Centurion Triathlon

The event is organised by Active Training World

Sunday June 24th 2018

Start Time: 7:00AM

Anyone over the age of 19 can enter this triathlon.

GPX Files

Online entries:Pay by major credit/debit cards


First 100 entrants can enter the Imperial distance for £100 and the Metric for £75

Entry fees will be £150 and £110 thereafter


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 a week before the race and will also be posted on this page. 

icon Event Profile

Event Name

Centurion Triathlon

Event Distance

Imperial: 1.25-mile swim, 83.75-mile bike, 15-mile run Metric: 2km swim, 82km bike, 16km run


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


Swim exit: 1 Hour 15 minutes, Bike exit: 7 Hours, Finish: 10.5 Hours


Yes - minimum 2 and maximum 3. When registering please order athletes as 1. swim, 2. bike, 3. run


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












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


icon Prizes

Medal, finisher's shirt and a souvenir 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.

The Roman road-like Cole Green Way, linking Welwyn Garden City with Hertford will feature on the run course, exploring the eastern boundaries of your empire.

Swim Course Map

Bike Course Map

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.

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.

If circumstances deem the course to be unsafe or it falls outside the BTF guidelines, ATW have the right to change, move or cancel the event at short notice.



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

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.

No refund will be made to any entrant not completing the race.

The last date for refund or deferral requests is May 24th 2018. A 75% refund will be given if requested before this date.

You can transfer your place to another athlete up to June 17th 2018

No refund, transfer or deferrals accepted after June 17th 2018

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

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