London T100
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London T100 Triathlon
London T100 Triathlon is a multi-day triathlon festival in London on 21-22 August 2027. The event offers multiple race formats, including the T100 100 km distance, Olympic, Sprint and Super Sprint distances. The course information lists a freshwater swim, flat bike sections and flat run sections. Average air temperature is given as 18–21°C and average water temperature as 18–24°C, with wetsuit guidance provided.
Race formats and distances:
- 100 km Triathlon: 2 km swim, 80 km bike, 18 km run
- Olympic Triathlon: 1.5 km swim, 40 km bike, 10 km run
- Sprint Triathlon: 750 m swim, 20 km bike, 5 km run
- Super Sprint Triathlon: 400 m swim, 10 km bike, 2.5 km run
Team relay options are available for selected distances, with relay entries possible in Olympic and Sprint formats. The London course passes notable city landmarks such as Tower Bridge and the London Eye and runs through sections with crowd support. All T100 Triathlon events are qualifiers for the Qatar T100 World Championship finals. Entries include a defined refund policy: 50% refund up to 90 days before the event and 25% refund until 30 days before the event. The event page also notes a travel partnership with Nirvana for bespoke travel services. Visit the organization's website for the most recent information.
