Dorney Lake Triathlon

Name: Dorney Lake Triathlon
Start: 2026-07-12
End: 2026-07-12
Location: Windsor

Windsor, United Kingdom

Registration

RunThrough UK’s Dorney Lake Triathlon takes place at Dorney Lake, Windsor, UK. The event offers a Super Sprint (400m swim, 9.5km bike, 2.5km run), Sprint (750m/19km/5km), and Standard (1500m/38km/10km) triathlon, plus Sprint and Standard Relays and Aquabike options. The race uses the purpose-built Olympic venue, with a flat, fast course ideal for PBs, marked distance flags, and ample marshals.

Expect a friendly, well-serviced event village with food and drink, free race photos, and themed medals. Highlights include chip-timed results, post-race goodies, sustainability initiatives, and flexible options for teams or solo competitors. The atmosphere is upbeat, with marshals guiding participants and spectators enjoying a supportive, festival-like village. Visit the organization's website for the most recent information.

United Kingdom South East (England) Windsor

Always double-check with the organizer's website – things can change, and we might have sprinted past a few details! This page may contain affiliate links.

38 km

Standard Triathlon - 1500m Swim, 38km Bike (8 Laps), 10km Run

38 km

Standard Relay - 1500m Swim, 38km Bike, 10km Run

19 km

Sprint Triathlon - 750m Swim, 19km Bike (4 Laps), 5km Run

9 km

Super Sprint Triathlon - 400m Swim, 9.5km Bike (2 Laps), 2.5km Run

9 km

Sprint Relay - 400m Swim, 9.5km Bike, 2.5km Run

Standard Aquabike

Sprint Aquabike