Hertfordshire Triathlon Summer

The event is organised by Active Training World


With huge disappointment for us here at Active Training World, this month's event will not be featuring the open water swim. This is due to the unsafe levels of blue green algae which are present in Stanborough Lake. However, Stanborough Lakes and the Environment Agency have been working hard to ensure this doesn't happen again in the future, even if we get another heat wave like we have done this year. The new race format is listed below. We hope you can still make it, as it'll be a cracker of an event!

Sunday August 19th 2018

Back for its fourth year! This event will feature sprint and standard distances. The standard distance duathlon includes the Herts Club Championships. 

Anyone can enter this race.

Online entries:Pay by major credit/debit cards



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 on the morning of the race. Registration will open at 06:15am and close at 07:15am. Please arrive in plenty of time to collect your registration pack and set up in transition.

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

Hertfordshire Triathlon Summer

Event Distances

Sprint: 5Km run | 20Km bike | 2.5km run
Standard: 10Km run | 38Km bike | 5Km run


The bike and run courses are fast, but both contain 1 testing hill each.


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


Water will be provided and at the end of the race and on the run laps




The bike will not be traffic free but the run will be traffic free








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 and souvenir for all finishers

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

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

Hertfordshire Standard Champion in each BTF 10-year age group. (You must be born in Herts or have lived there for at least 12 months prior to the event.)

Hertfordshire Club Championship Trophy - Standard Distance

icon Course Information

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

The race consists of a run on hard packed paths and short-cut grass, plus an on-road bike leg, followed by a final run on the same course. 


icon Training Plans

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


Other Race Information

Race Start
There will no longer be waves for this event. All competitors will start at the same time. 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.


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

The last date for refund or deferral requests is July 19th 2018. A 75% refund will be given if requested before this date.

You can transfer your place to another athlete up to August 12th 2018

No refund, transfer or deferrals accepted after August 12th 2018



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

(1) I declare that I am medically fit to compete & understand that I do so entirely at my own risk.

(2) 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.

(3) I understand the organisers reserve the right to alter the arrangements and conditions, should circumstances require.

(4) By entering this event, the athlete indicates acceptance of BTF rules


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

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