ATW Dorney Triathlon - September | Dorney Lake, United Kingdom

About the Event

Race on hallowed ground at the Dorney Triathlon on Saturday, September 26, 2026, where you can push your limits on the same pristine, closed-road course that hosted the London 2012 Olympic rowing events. This late-season classic offers the ultimate fast and safe multi-sport experience, with a clear-water rowing lake swim, a flat and smooth bike circuit, and a traffic-free run, all set within the inspiring confines of Dorney Lake. Choose your challenge from Super Sprint, Sprint, or Standard distances, including Aquabike and Relay options, making it the perfect event for both seasoned triathletes chasing a personal best and newcomers taking on their first organized swim-bike-run. Organized by ATW, the UK's largest multisport specialist, the event guarantees professional, draft-illegal racing with enthusiastic support, allowing you to focus purely on your performance in a world-class environment. Whether you're looking to cap your season with a strong result or simply experience the thrill of racing at an iconic Olympic venue, Dorney delivers an unforgettable and accessible triathlon adventure. Secure your spot for a crisp September Saturday where the only thing as inspiring as the location is your own achievement.

Races Offered

Sprint

Sep 26, 2026

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Distance — 19 km 5 km

terrain

Type — Multisports

timer

07:30

Sprint Aquabike

Sep 26, 2026

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Distance — 19K

terrain

Type — Multisports

timer

07:45

Sprint Relay

Sep 26, 2026

straighten

Distance — 19 km 5 km

terrain

Type — Multisports

timer

07:45

Standard

Sep 26, 2026

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Distance — 38 km 10 km

terrain

Type — Multisports

timer

08:30

Standard Aquabike

Sep 26, 2026

straighten

Distance — 38K

terrain

Type — Multisports

timer

08:45

Standard Relay

Sep 26, 2026

straighten

Distance — 38 km 10 km

terrain

Type — Multisports

timer

08:45

Super Sprint

Sep 26, 2026

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Distance — 10 km 2.5 km

terrain

Type — Multisports

timer

10:00

Weather History

These values represent the 3-year monthly averages for September in Dorney Lake.

thermostat Temperature

11.8° / 20.1°

wb_sunny Feels like

9.8° / 17.8°

light_mode Avg sunshine hours

8h 34m

water_drop Avg rainfall

3.2 mm

ac_unit Avg snowfall

—

air Avg wind speed

13.3 km/h (Gentle breeze)

opacity Sweat loss rate

Moderate

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Moderate (3.5)

humidity_mid Humidity

77.7%

wb_twilight Sunrise

06:38

nightlight Sunset

19:15

About Dorney Lake

Learn more about the host city, Dorney Lake.

Dorney Lake is a purpose-built rowing lake and Meetings & Events Venue in England. It is near the village of Dorney, Buckinghamshire, and is around 3 km west of Windsor and Eton, close to the River Thames.