JLL Property Triathlon 2026
The JLL Property Triathlon returns June 26th, 2026 at Dorney Lake for its 19th edition, supporting Age UK. Registration is now live, sign up to take part.
The JLL Property Triathlon
Different events to choose from
Race spots across all events in 2025
Tents available for corporates to have their own branded space
5 events to choose from
Individual Triathlon
If you are looking for the ultimate challenge the Individual Triathlon is for you, starting with a 750m open water swim in the rowing lake, followed by 21.2km on the bike (four laps around the lake), finishing with a 5km run along the edge of the water.
View the triathlon course map here.
Individual – £89
Relay Triathlon
The Relay Triathlon is a team event, which requires 2 or 3 members to share the 3 legs – teams of 3 share the open water 750m swim, followed by a 21.2km bike, and finishing with a 5km run along the lake. If taking part as a team of 2, one person takes on 2 of the legs.
View the relay triathlon course map here.
Relay Triathlon - £120
Duathlon
For those that would rather skip the swim, the Duathlon might be for you, starting with a 5km run along the lake, followed by 4 laps around the lake (21.2km) on the bike, finishing with another 2.5km run.
View the duathlon course map here.
Duathlon - £62
Swim
If swimming is your thing, there is the option to take part in the ultimate 2.2km open water swim; 1 full length of Dorney rowing lake.
View the swim course map here.
Swim - £38
5km Run
There is also a 5km running race, which is two laps along the side of the rowing lake on tarmac paths.
5km Run - £22
Sub 1 Hour 20
A competitive sprint triathlon wave open to all ages and genders for those able to complete the triathlon in under 1hr 20 mins. Limited places available.
View the sprint triathlon course map here.
Individual Sub 1 hour 20 mins – £89
Frequently asked questions
View the Registration guide here.
Most of your entry fee goes straight to Age UK, our charity partner. If you wish to change the amount of your donation or opt out of it, please contact A.S.O. UK at propertytriathlon@jll.com.
Click here for directions to Dorney Lake. Traffic can be very heavy early on Friday mornings so we advise leaving plenty of time, especially if you’re in an early wave.
There is plenty of parking on site at Dorney lake, however, the walk from the car park to the main event area is around 15 minutes, please take this into consideration when planning your journey.
The main stations are Slough (Elizabeth line from Paddington), and Windsor & Eton Riverside (from Waterloo). Additional nearby stations include Burnham, Taplow, Maidenhead and Windsor & Eton Central, all within a 15-minute drive of Dorney Lake.
JLL is pleased to partner with Age UK for the Property Triathlon, raising money to support their mission through essential services and local support. This fundraising effort will go towards Age UK’s national advice and friendship services, as well as providing vital assistance to local Age UK charities. These independent organisations offer a range of community services, including exercise classes, home help, and dementia support. Together, we can change older people’s lives – now and in the future.
