Dorney Triathlon August 2025

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Dorney Triathlon August 2025

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Booked 7 times in the last week

£33 - £99

Booked 7 times in the last week

About

Join RunThrough for a summer's morning triathlon at Dorney Lake. Enjoy the cool open-lake swim under the heat of the summer sun and dry off as you cycle and run around the waterside. This flat route is perfect for athletes of all levels so come and to claim your finisher's medal.

Sprint Triathlon, Sprint Aquabike, Sprint Relay, and 4 more

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Sat, Aug 9, 2025

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Windsor, United Kingdom

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Who‘s Attending?

32 community members attending

+29

Where and when

Location

Dorney Lake, Dorney Lake, Windsor SL4, UK

Start times

Saturday, Aug 9, 2025

Sprint Triathlon: 7:30 AMSprint Aquabike: 7:30 AMSprint Relay: 7:30 AMStandard Triathlon: 8:30 AMStandard Aquabike: 8:30 AMStandard Relay: 8:30 AMSuper Sprint Triathlon: 10:00 AM

Event summary

Here are the distances available for Dorney Triathlon August 2025

Sprint Triathlon

0.75km

20km

5km

£78

Standard Triathlon

1.5km

37km

10km

£99

Sprint Aquabike

0.75km

20km

£68

Standard Aquabike

1.5km

40km

£89

Route information

Terrain: Tarmac/Lake swim

Elevation: Flat

A flat and smooth course at the stunning Dorney Lake nestled within 450 acres of parkland makes this a perfect site for a personal best.

The swim portion of the event takes place within the lake, and from here triathletes cycle the lake's perimeter along the tarmac. The final stretch, the run, will consist of an out-and-back along the lakeside.

These events are suitable for participants of all abilities but perfect for beginners or those just starting out in this event.

Sprint

Swim - 750m
Bike - 20k
Run - 5k

Standard

Swim - 1.5k
Bike - 37k
Run - 10

Sprint Aquabike

Swim - 750m
Bike - 20k

Standard Aquabike

Swim - 1.5k
Bike - 40k

What's included

Marshalled course
Way-marked route
Prizes for category winners
Medal
Photos

How to get there

Dorney Lake, Dorney Lake, Windsor SL4, UK

Get full directions

Parking

There will be parking available at the event for entrants.

By Car

Dorney Lake is easily reachable from London. If you are coming along the M4 then take the exit at Junction 7.

There are two Pay & Display carparks available on-site for visitors.

By Public Transport

The closest railway stations are Slough and Windsor & Eton Riverside, both of which are approximately a 20 minute drive away.

Event day logistics

7:30am Sprint Open SOLD OUT

7:45am Sprint Female SOLD OUT

8:30am Standard Open Under 50 only SOLD OUT

8:30am Sprint Aquabike

8:45am Standard Female and Over 50 Open SOLD OUT

9:10am 5k, 10k & Half Marathon runs

10am Super Sprint

**Categories based on age at 31st December 2025**

*Please arrive at least 45 minutes before the start of the race to allow enough time to register, set up your transition area and warm up.

Race Packs

Race Packs must be collected on the day of the event, before the start of your race, from registration. Please be aware that you will not receive anything in the post.

Age Requirements

All participants must be at least 15 to take part in this event.

Bag Drop

There will be an informal bag drop at the event village where participants can leave their belongings.