The All Nations Half Marathon Run

MAY
9
2026
Race at the historic Olympic venue of Dorney Lake in a fast supersprint triathlon featuring a flat closed road bike and run course. Enjoy a professional atmosphere with chip timing and on site facilities near Windsor.
Sat 9 May 2026
5 kilometers

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The All Nations Triathlon

The All Nations Triathlon takes place at Dorney Lake near Windsor, a former Olympic rowing venue. This event features a supersprint triathlon distance, utilizing the lake and the surrounding flat grounds. The course is designed on closed roads to provide a fast environment for all participants.

The event consists of the following distances:

  • Supersprint Triathlon: 400m swim, 20km bike, and 5km run

The swim takes place in the waters of Dorney Lake. The cycling portion consists of four laps around the lake on a flat road surface. This is followed by an out-and-back run course that participants complete twice to finish the race. As a British Triathlon Federation (BTF) registered event, specific rules apply, including non-drafting regulations on the bike leg.

Participants receive chip-timed results and a spinning finisher's medal. Trophies are awarded to top finishers. The venue provides several amenities, including on-site showers, changing facilities, and toilets. Snacks and drinks are also available. For those traveling by car, free on-site parking is provided. The location is also accessible via several nearby train stations, including Slough, Windsor & Eton Riverside, and Maidenhead.

Race packs are collected on the day of the event during registration. Mandatory equipment includes a bicycle in good working order and a helmet. Wetsuit use is determined by the water temperature on the day of the race. Visit the organization's website for the most recent information.

5 km
Supersprint Triathlon (run)
Supersprint Triathlon (bike)
Supersprint Triathlon (swim)