ATW Dorney Triathlon - July | Dorney Lake, United Kingdom

About the Event

Claim your personal best on the legendary, traffic-free circuit of a London 2012 Olympic venue. The Dorney Triathlon - July returns on Sunday, 12th July 2026, offering a unique and inspiring race day at the iconic Dorney Lake near Windsor. Designed for pure speed, this flat, non-drafting course features a crisp swim in the clear rowing lake, a fast multi-lap bike leg, and a run along the picturesque shoreline—perfect for chasing a chip-timed PB in a safe, closed environment. With Super Sprint, Sprint, and Standard distances, plus Aquabike and Relay options, it caters to everyone from first-timers to seasoned competitors. Experience the thrill of racing on hallowed Olympic ground and secure your spot for an unforgettable summer event.

Races Offered

Sprint

Jul 12, 2026

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Distance — 20 km 5 km

terrain

Type — Multisports

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07:30

Sprint Aquabike

Jul 12, 2026

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Distance — 20K

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Type — Multisports

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07:45

Sprint Relay

Jul 12, 2026

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Distance — 19 km 5 km

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Type — Multisports

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07:45

Standard

Jul 12, 2026

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Distance — 38 km 10 km

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Type — Multisports

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08:30

Standard Aquabike

Jul 12, 2026

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Distance — 38K

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Type — Multisports

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08:45

Standard Relay

Jul 12, 2026

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Distance — 38 km 10 km

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Type — Multisports

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08:45

Super Sprint

Jul 12, 2026

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Distance — 10 km 2.5 km

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Type — Multisports

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10:00

Weather History

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

thermostat Temperature

13.7° / 22.2°

wb_sunny Feels like

12.0° / 19.9°

light_mode Avg sunshine hours

11h 0m

water_drop Avg rainfall

2.9 mm

ac_unit Avg snowfall

—

air Avg wind speed

13.1 km/h (Gentle breeze)

opacity Sweat loss rate

Moderate

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Moderate (5.6)

humidity_mid Humidity

70.1%

wb_twilight Sunrise

05:05

nightlight Sunset

21:10

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.