Dorney Lake Triathlon August 2025

Join us for the Dorney Triathlon on Saturday 9th August 2025

Take on a Super Sprint Sprint or Standard triathlon around Dorney Lake on Saturday 9th August 2025 and take the opportunity to race around this unique and inspiring Olympic venue!

The purpose built lake is perfect for the swim and the flat grounds lend themselves to a totally flat bike and run course, the ideal venue for a chip timed personal best. Each discipline will be accurately marked out with distance flags and we will have plenty of helpers to keep you on track and to encourage you all the way to the finish.

For those who don’t want to take part in the run, there is also an Aquabike (swim-bike) option, and for those who would like to compete as a team, there is a relay option, which allows 2 or 3 individuals to share the disciplines between them.

Your entry will include:

Chip timed results

Unique themed medal 

Free official event photos

Come and enjoy the day with us; we hope to see you there!

ONCE YOU ENTER YOU WILL RECEIVE A CONFIRMATION EMAIL. MORE INFORMATION ABOUT YOUR RACE PACK AND THE BIG DAY WILL BE SENT CLOSER TO THE EVENT – ENJOY!

Super Sprint: 400m Swim | 10km bike | 2.5km Run
Sprint: 750m Swim | 20km bike | 5km Run
Standard: 1500m Swim | 40km bike | 10km Run

Start times- subject to change:
• 7:30am – Sprint Tri –Under50 ‘Open’ category
• 7:45am – Sprint Tri – 50 and Over ‘Open’ category & All Female category & All Sprint Relays & All Sprint Aquabike
• 8:30am – Standard Tri – Under40 ‘Open’ category
• 8:45am – Standard Tri – 40 and Over ‘Open’ category & All Female category & All Standard Relays & All Standard Aquabike