Dorney Lake Triathlon

AUG

8

2026

Dive into a fast, friendly tri at Dorney Lake in Windsor with a purpose built lake swim and flat road bike and run courses ideal for PBs. Choose Super Sprint to Standard or team up via relay or aquabike for a fun, chip timed race experience.

Sat 8 Aug 2026

Windsor, South East (England)

Registration

Sprint Relay Swim Standard Relay Swim Super Sprint Triathlon Ru... Sprint Relay Run Sprint Triathlon Run

Always double-check with the organizer's website! This page may contain affiliate links.

Event overview

The Dorney Lake Triathlon takes place on Saturday 8 August 2026 at Dorney Lake, Windsor, UK. The venue features a purpose-built lake for the swim and flat grounds for the bike and run courses, which are run on road. The event is chip timed and marshals will be present on course. Entry fees range from £58 to £120 and the event was booked 148 times in the last month. Relay and aquabike options are offered; relays allow 2 or 3 individuals to share the disciplines and aquabike covers swim and bike only.

Race distances

Super Sprint Triathlon: 400m swim, 9.5km bike (2 laps), 2.5km run. Elevation 20m, terrain road.
Sprint Triathlon: 750m swim, 19km bike (4 laps), 5km run. Elevation 40m, terrain road.
Standard Triathlon: 1500m swim, 38km bike (8 laps), 10km run. Elevation 80m, terrain road.

Included with entry

Entries include a themed medal, free race photos, chip-timed results and post-race goodies. The event village will provide food and drink options and assistance from event staff and marshals. Visit the organization's website for the most recent information.