Dorney Lake Triathlon

RunThrough's Dorney Lake Triathlon takes place at Dorney Lake in Windsor, UK, on a purpose-built Olympic venue. The event offers Super Sprint, Sprint, and Standard triathlons, plus Sprint and Standard Relays and Aquabike options. The flat, fast course uses a lake swim and road-based bike and run sections with clearly marked distance flags.

Distances include: 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. The atmosphere features friendly marshals, a lively event village with food and drink, free race photos, a themed medal, and post-race goodies, plus chip-timed results and a sustainability focus. Visit the organization's website for the most recent information.