Dorney Triathlon — 26th July 2026

The Dorney Triathlon on 26 July 2026 is a RunThrough‑promoted triathlon held within the purpose‑built Dorney Lake Olympic venue in Windsor. The event takes place entirely inside the Dorney Lake grounds with start and finish by the boathouse, and offers multiple distances including Super Sprint, Sprint and Standard (Olympic) formats suitable for a wide range of abilities. The site is promoted as a flat, fast course with accurately marked distances and is popular with athletes chasing personal bests.

Racing is chip timed and entries include a themed finisher medal and free official event photographs; aquabike and relay team options are also offered. The event runs within a morning window (first starts from 07:30, event close around 13:30) and competitors must hold British Triathlon membership or purchase a single‑use Race Pass where applicable. Onsite facilities include an event village, toilets near transition and free signposted parking; nearest rail stations are Slough and Windsor & Eton Riverside.