Dorney Lake Triathlon
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Dorney Lake Triathlon - 3 October 2026
The Dorney Lake Triathlon takes place at Dorney Lake in Windsor, Berkshire. The event is organised by RunThrough and offers multiple race formats across swim, bike and run disciplines at a former Olympic venue with calm open water and traffic-free laps beside the lake.
Participants can enter individual or team formats, including Super Sprint, Sprint and Standard distances, plus Sprint and Standard relays and Aquabike options. The course uses wide roads and paths described as flat, with chip timing for accurate results.
Available distances:
- Super Sprint: 400m swim, 9.5km bike (2 laps), 2.5km run
- Sprint: 750m swim, 19km bike (4 laps), 5km run
- Standard: 1500m swim, 38km bike (8 laps), 10km run
Entry fees listed range from £58 to £120 depending on race choice. Elevation figures and terrain are provided for each distance. Included with entry are a themed medal, free race photos, chip-timed results and post race goodies. Marshals and wayfinding are provided on course and an event village offers food and drink options.
The organiser notes that sustainability has become an important issue for participants and that work is underway to address it at events. Visit the organization's website for the most recent information.
