Royal Windsor Triathlon

The Royal Windsor Triathlon takes place on Sunday 14 June 2026 in Windsor, Berkshire, and offers Sprint and Standard distance triathlon options alongside relay formats and a dedicated Macmillan Beginners Wave. The course is promoted as a truly British triathlon experience with an open-water River Thames swim, an epic country cycle and a closed-road finish in Windsor, including a run past Windsor Castle and along the Long Walk. The event is branded as the Royal Windsor Triathlon and is being delivered in partnership with RunThrough, with charity entries promoted for Macmillan Cancer Support.

Competitor services and information are published on the official event site, including course maps, road closure notices, bike and wetsuit hire options, official photos and previous results. Entries are handled via the official event pages and RunThrough entry links; typical inclusions noted on the entry pages are a themed finisher medal, free event photography and chip-timed results. The 2026 edition is promoted as a milestone year for the event and includes logistical resources for participants to prepare ahead of race day.