We are delighted to be running the Beachborough & Brackley Triathlon at Stowe School on 18 June 2023.  Also back for another year is the very popular 4X Mixed Relays on the same day.

Beachborough & Brackley Triathlon is affiliated to Triathlon England and will again be part of the South Central Triathlon Series. Online entries are now live for both competitions, but places are limited so we advise you book early to avoid disappointment!

Our Beachborough & Brackley event permit 2023 can be viewed here >


Site opens for car parking at 07:30
Registration opens 08:00
Bike checks open 0800 at transition

Individual Race Timings

You can register your child at anytime from 08:00 am.

Timings coming soon!

4X Relay Race Timings

You can register your child at anytime from 10:00 am – 12 pm. Please can one person collect the numbers for the whole team

Timings coming soon!

Individual Triathlon Race Distances

Transition / Bike Racking

(This will be open all day)


The bikes are located about 100m from the pool exit. All children must wear a helmet and after the swim, you must not touch your bike until your helmet is fastened. No aero bars or deep rim wheels are allowed. There will be a mount and dismount line. All children must either wear tri-suits or a t-shirt to cover their torso. (T-shirts must be put on after the swim in the transition area). Any type of bike is acceptable, mountain bike, cyclocross or road, but it must be mechanically sound and safe to ride.

Bike Check

Please allow extra time before entering transition for your bike to be checked. Ensure the reverse of your child’s race number has been filled in with their emergency contact details, as this will be checked prior to being allowed into transition. 

Race Briefing


Each age group will have a race briefing before the start of their race where you can learn about any last-minute changes to the course and ask questions. The race briefing will be next to registration and it is compulsory to attend.




Swimming will be Stowe’s 25 m indoor pool. Children will start in the water. No diving allowed. Each swimmer will complete the set number of lengths before exiting the pool. You will be given your chip to wear on your leg on the poolside. You must wear this on your left leg until you finish the race. Swimming hats are compulsory (please bring your own).


Bike Route

This will be on grass/tarmac mix and will be a series of laps. Once completing the set number of laps, return to transition, rack your bike and continue on the run. You must not mount your bike before the mount line or dismount after the dismount line.


Run Route


You will run around a market course and finish under the finish gantry. The timing chip will be removed at the end and handed back to a marshal. There will be water available throughout the run. Please remember it is your responsibility to count the correct number of laps on the bike and the run.

Individual & 4X Mixed Relay Course / Event Map

4X Team Relay

The 4X Mixed Relay comprises of two boys and two girls who must compete in the following order: girl, boy, girl, boy. Each athlete completes a mini-triathlon of swimming, biking and running, before passing over the timing chip to their next teammate. You must organise your own teams and enter via StuWeb. All teams are within the same age group categories.

Team Relay Race Distances

Team Transition

The 4X Team Relay bikes need to be racked together before the race briefing. All details are the same as the individual race.


Team race briefing

As per the individual race, there will be a mass race briefing for all age groups before the relays start next to registration.


Team swimming

The first athlete in the team will be given the team chip to wear on their left leg at the poolside. The first athletes in the team will start in the water for a mass start. No diving allowed. Each swimmer will swim around the buoys in the pool to complete the set distance ( see table above ) before exiting the pool. Swimming hats are compulsory (please bring your own).


Team bike route

As per the individual bike route.


Team run transition

You will run around a marked course and finish at the chip hand over point. At this point, each competitor will remove the team’s timing chip and hand it to the next team member waiting in the chip handover area before this competitor then runs to the pool to start their triathlon. It is each athlete’s responsibility to properly fasten the timing chip before they start. This process is repeated until the fourth member of the team runs to the finish line where they will remove the timing chip and hand it back to a marshal. There will be water throughout the run.

Race day kit and transition information

Download our information to Race Day Kit and Transition guide for triathlon events here >

General Information

Car Parking

The Beachborough Triathlon takes place at Stowe School, (near Buckingham MK18 5EH). There is a designated car park and you will need to walk a short distance with all your equipment to the front of the school building (200m).

Registration opens at 08:00 am – 1.30 pm

You can register anytime throughout the day. Registration will take place in the North Hall (Entrance Hall) at Stowe School, where you will receive your race information packs and goody bags. Please ensure you register one hour before your rate starts. Toilets will be available to use in the school. Timing chips will be handed out at the swimming pool.



Every child will receive a finishers medal once they cross the finish line. Presentations will take place as soon as possible after each age group has finished and will be awarded 1st to 10th place.



These will go on Stu Website (www.stuweb.co.uk) as soon as possible after the event.


Expo Area

There will be an Expo and Refreshments stands and a variety of stalls.



We politely request no dogs on the school grounds, please.


Child Protection & Safety

Throughout this event, the safety and well-being of the children competing in the event are of paramount importance to us, but also to the continued success of children’s triathlon in the United Kingdom. The race marshals are there to ensure the safety of the children at all times throughout the race. Certain key officials for the triathlon have been vetted by the CRB or DBS and British Triathlon to work with children.

We look forward to seeing you on race day. 

Expo's attending our event