- Sun 21 Sep 2025
5K Swim
13:30
Age 16 & over
£42
- 5 km lake swimming
Event overview
The venue is private and specifically hired for the purpose of a traffic-free triathlon and swimming events.
Flat and very, very fast! Dorney Lake is renowned for its traffic-free, smooth tarmac course. It is the perfect setting for first-time racers and more experienced athletes alike.
This event is part of Eton Dorney Triathlon & Swims.
Event photos
- All fitness levels
- Dogs allowed
- Event village
- Families
- Free venue entry
- Newcomers
- Spectators
- Swim hat provided
- Swim hat required
- Teams
- Wetsuit not allowed if too hot
- Wetsuit optional
- Wetsuit required if too cold
Timetable
Triathlon briefings will be held 10 minutes before the start in the swim in area. You must attend the briefing ready to start your triathlon.
Teams
All the distances are open to teams of 3.
Each team member completes a discipline in succession. You must inform the staff at registration that you are a team entry as you will have specific instructions for handing the chip between team members.
Spectators
Eton Dorney is the perfect venue for spectators with a large viewing balcony and cafe at the boathouse.
- Bag storage
- Cafe
- Changing facilities
- Free parking
- Park
- Rural
- Showers
- Toilets
- Urban
Event HQ
Dorney Lake
Off Court Lane, Lake End Road
Windsor
Buckinghamshire
SL4 6FJ
UK
Transition
The transition area is in front of the shower/toilet block and event registration.
- 2 laps
- Cut off time
- First aid
- Food stations
- Out and back
- PB
- Water stations
- Wave start
Swim
5km course x 2 laps.
5km clockwise. Rectangle course. The water is very clean and clear. The lake tends to warm up very quickly after a few days of sunshine. The course marked by large inflatable buoys. Keep these to your right.
Start
Starts will be a mass floating start on completion of the event briefing.
Map
Cut off times
2hr 30 mins.
Sustainability
- Bring your own cup
- Recycling
- Reusable cups
- Cake
- Chip timing
- Map
- Medal
- T-shirt
Included
- Chip timing and live results
- Water safety
- Hot showers and changing areas
- Toilets
- Event medics
- Drinks and feed stations on course
- Cake and coke at the finish
- Baggage storage in the registration tent
- Free car parking on site
Optional extras
- Finishers medals to be ordered when booking
- Event t-shirts / hooded tops to be ordered when booking
- Age 16 & over
- Entries open
- Enter online
- Event merch available
- Race pack by email
Entry fees
Entry fee
£42.00
“I absolutely love this event and venue. The staff could not have been more helpful for my first ever triathlon!”
Julie Kettler
Other races at event
- Sun 21 Sep
- #1 of 0
Super Sprint
11:30
Age 15 & over
£62-£77
- 450 m lake swimming
- 10 km road cycling
- 2.5 km trail running
- Sun 21 Sep
- #2 of 0
Sprint
10:00
Age 15 & over
£72-£87
- 750 m lake swimming
- 20 km road cycling
- 5 km trail running
- Sun 21 Sep
- #3 of 0
Standard
08:00
Age 17 & over
£82-£97
- 1.5 km lake swimming
- 40 km road cycling
- 10 km trail running