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THE EVENT
Our Eton Dorney Family Triathlon offers both adult and junior competitors a choice of:
- Adult Sprint Triathlon (15+)
- Super Sprint Triathlon (15+)
- Youth Triathlon (Ages 15-16)
- Tristars Triathlon Start, 1, 3 & 3 (Ages 8-14)
- Family Fun Triathlon (Non Competitive)


A GREAT DAY OUT FOR ALL THE FAMILY
Dorney Lake provides a fantastic opportunity within a closed road environment for both adults and kids to race in a safe environment without the fear of traffic. Not only is it safe its also a beautiful place to swim, bike and run.
KIDS AND BIG KIDS
At this event we host events suitable for both serious athletes, and those just looking to have some fun. We aim to be as inclusive as possible providing both competitive and non competitive opportunities for kids and big kids to enjoy the sport at its best.

EVENT DETAILS
RACE DISTANCES
Sprint | Super Sprint | |
Swim | 750m | 400m |
Bike | 19.5km | 9.75km |
Run | 5km | 2.5km |
The Swim
Consists of a looped swim for swimmers and a single lap swim for triathletes in an anti clockwise direction.
Super Sprints will head left at the first yellow cylindrical buoy
Sprints will turn left at the first red cylindrical buoy
The Bike
Course will consist of Bike course consists of a 4.88km anti clockwise loop.
Super sprints will complete 2 laps
Sprint distance athletes will complete 4 laps.
DRAFTING
We have static marshals at key locations on the bike course and they will report you if you are seen to be breaking these rules. One of their key tasks is to identify anyone gaining UNFAIR ADVANTAGE through drafting.
THIS IS A NON DRAFTING EVENT.
The Run
consists of an out and back course.
Super Sprint distance athletes will complete complete one our and back loop.
Sprint Distance athletes will complete two out and back laps.
Awards
Awards will be sent out in the post following the event and placings announced via email and social media online.
Awards will be issued on the following basis.
Overall 1-3 Male & Female in All Races.
RACE DISTANCES
Wave Time* | Age Group | Age | Drafting allowed | Date of birth age range | Swim Distance | Bike Distance | Run Distance |
10:30 | Youth | 15-16 | Born in 2007/08 | 400m | 10km | 2.4km | |
10:45 | Tristar 3 | 13-14 | Born in 2009/10 | 300m | 5km | 2.4km | |
11:15 | Tristar 2 | 11-12 | Born in 2011/12 | 200m | 5km | 1.8km | |
11:45 | Tristar 1 | 9-10 | Born in 2013/14 | 150m | 3km | 1.2km | |
12:15 | Tristar Start | 8 | Born in 2015 | 100m | 1.5km | 600m |
*all times subject to change
THE SWIM COURSE
Your race day will see your child start in the lake where they will swim a single lap course.
Starting in the side lake they will swim under the bridge and into the main lake before exiting the water and heading straight into transition.
Age Group | Swim Distance | Laps |
Youth | 400m | 1 |
Tristar 3 | 300m | 1 |
Tristar 2 | 200m | 1 |
Tristar 1 | 150m | 1 |
Tristar Start | 100m | 1 |
THE BIKE COURSE
Once in transition they will don their trainers, race number, bike helmet, anything else they need and grab their bike. Heading out of transition they will run to the mount line and get on their bike. They will then complete between the required number of out and back laps of our closed road bike course in order to complete the required distance. Once they have completed the distance they will head to the dismount line and back into transition.
Age Group | Bike Distance | Laps | |
Youth | 10km | 2 | |
Tristar 3 | 5km | 1 | |
Tristar 2 | 5km | 1 | |
Tristar 1 | 3km | 1 | |
Tristar Start | 1.5km | 1 |
THE RUN
Having completed the bike your child will return to transition, rerack their bike and helmet and grab anything else they wish to take with them on the run.
Heading out onto the course they will complete between 1 & 4 laps of the 600m loop passing the finish line each time in order to complete the required distance. Once they have completed the final lap it straight up the finish line and into the race village to receive their medal and finish time.
Age Group | Run Distance | Laps |
Youth | 2.4km | 4 |
Tristar 3 | 2.4km | 4 |
Tristar 2 | 1.8km | 3 |
Tristar 1 | 1.2km | 2 |
Tristar Start | 600m | 1 |
The Family Fun Triathlon is perfect for those wanting to give their kids to complete their first triathlon with a parent right alongside. This non competitive event takes place at the end of the event and gives freedom on the course to swim, ride and run at your own pace.
This event operates slightly differently to a traditional fixed distance event, after an initial fixed 100m swim you will be afforded time on the 1.5km bike and 600m run course to complete as much distance as you or you child wants.
THE SWIM
The swim hugs the bank of the lake over 100m so that the shallows are always within easy reach, exiting the water straight into transition.
Here you’ll get ready and head out on the bike riding up and down the lakeside closed roads.
THE BIKE
You will have free reign over the bike course until 30 minutes after the event starts.
THE RUN
You will have free reign over the run course until 45 minutes after the event starts.
All ages as per 31st December 2023, from 15 you may choose to participate in either youth or the normal Sprint, Super Sprint events.


CHECK OUT THE REVIEWS FROM OUR PAST EDITIONS
WHAT YOU GET WITH YOUR ENTRY
- Unique Finishers Medal
- Live Tracking/Timing
- Expert Safety Team & Organisation
- Free Event Photos
CANCELLATION INSURANCE
This event is covered by Event Protect. If the event is cancelled, you can apply for a refund directly from Event Protect provided the cancellation is covered by their insurance policy. Learn more about Event Protect.
You may opt at the checkout to protect your entry from injury or similar by taking out cover through Booking Protect.
ENTRY FEES
Till End Feb | Till End June | Standard | |
Sprint | £52.80 | £59.50 | £66 |
Super Sprint | £48.00 | £54.00 | £60 |
Youth | £35.20 | £39.60 | £44 |
Tristars 3 | £35.20 | £39.60 | £44 |
Tristars 2 | £35.20 | £39.60 | £44 |
Tristars 1 | £35.20 | £39.60 | £44 |
Tristars Start | £32.00 | £36.00 | £40 |
Family Fun (per team) | £35.00 | £39.00 | £44 |
ENTRIES COMING SOON
Early Bird pricing runs till the end of June.