Eton Dorney Family Triathlon

JUL

2026

Make a splash at the Eton Dorney Family Triathlon at Dorney Lake in Windsor. Enjoy open water swims, a flat traffic free bike course and a spectator friendly run with race options for adults, juniors and relays.

Sun 19 Jul 2026

Dorney, South East (England)

Registration

Tristar 1 Lake Swim Tristar 2 Lake Swim Tristar 3 Lake Swim Tristar Start Lake Swim Youth Lake Swim

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Eton Dorney Family Triathlon

The event is organised by Barnes Fitness and takes place at Dorney Lake, Court Lane, Windsor, SL4 6QP on 19 July 2026. It features an open water swim in Dorney Lake, a flat traffic-free road bike course and a spectator-friendly run course. The venue uses closed roads for the bike and transition areas and includes both adult and junior racing formats. Visit the organization's website for the most recent information.

Race formats and entry fees

Adult Sprint Triathlon - 750m swim, 19.5km bike, 5km run. Age 15+. £66.
Sprint Relay Triathlon - 750m swim, 19.5km bike, 5km run. Age 15+. £80.
Super Sprint Triathlon - 400m swim, 9.75km cycle, 2.5km run. Age 15+. £54.
Youth Triathlon - 400m swim, 10km cycle, 2.4km run. Age 15-16. £47.
TriStar 3 - 300m swim, 5km cycle, 2.4km run. Age 13-14. £45.
TriStar 2 - 200m swim, 5km cycle, 1.8km run. Age 11-12. £42.50.
TriStar 1 - 150m swim, 3km cycle, 1.2km run. Age 9-10. £40.
TriStar Start - 100m swim, 1.5km cycle, 600m run. Age 8. £38.
Family Fun Triathlon - non-competitive event. Open to entrants aged 7 and over. £38.