The Royal Windsor Triathlon Presented by Sigma Sports 2026 took place on Sunday 14 June 2026 in Windsor, Berkshire — celebrating its 35th anniversary since the event was first created in 1991. Firmly established as one of the most iconic triathlon events in the UK, the race offers a truly royal setting: an open water swim in the River Thames (watch out for swans!), a road cycle past Windsor Castle and into the Berkshire countryside, and a memorable run through Windsor Great Park along the historic Long Walk with the Castle providing a majestic backdrop. Sprint and Standard (Olympic) distances are available alongside Relay options — making it perfect for first-timers and experienced triathletes alike. The event village at Alexandra Gardens offers a lively atmosphere, free finisher goodies, and the support of charity partner Macmillan Cancer Support. Celebrity alumni include Jonny Wilkinson, Jenson Button, Gareth Thomas and Princess Beatrice.
Distances at a Glance
🏅 Standard (Olympic)
Swim1,500 m
Bike40 km · D+243m
Run10 km · D+85m
Start07:00
Min age17 years
⚡ Sprint
Swim750 m
Bike22 km · D+127m
Run5 km · D+51m
Start06:00
Min age15 years
🤝 Relay
Standard relay07:00
Sprint relay06:00
FormatTeam splits 3 legs
Race end11:45
Sunday rackingOption available
Standard
Triathlon
07:00
🏆 Standard (Olympic) — 1,500m swim · 40km bike · 10km run · 07:00
Start 07:00 · Swim: River Thames open water (out-and-back near Queen Elizabeth Bridge and Baths Island) · Bike: 40 km D+243m road, Windsor Castle route + Berkshire countryside · Run: 10 km D+85m Windsor Great Park + Long Walk (Castle in view throughout) · Relay option available · Min age 17 · Race ends 11:45
Sprint
Triathlon
06:00
⚡ Sprint — 750m swim · 22km bike · 5km run · 06:00
Start 06:00 · Swim: River Thames open water 750m · Bike: 22 km D+127m Windsor road route past Windsor Castle · Run: 5 km D+51m Long Walk + Windsor Great Park · Perfect for beginners and first-timers · Sprint relay option available · Min age 15 · Friendly marshals throughout · Sunday racking option
Relay
Options
Team Relay — Standard or Sprint · Split between 3 athletes
Standard Relay starts 07:00 · Sprint Relay starts 06:00 · Team splits three legs (swim / bike / run) · Perfect for groups of colleagues or training partners · Early bird price from £135 (Standard) · Sunday racking option available for all relay formats
Practical
Info
Race day logistics · Racking · Travel · Charity
Venue: Alexandra Gardens, Windsor SL4 1RF · Race end: 11:45 · Event village: food, drink, free finisher goodies · T-shirt available at checkout (30%+ off) · Sunday racking option available · Charity partner: Macmillan Cancer Support · Travel: Windsor & Eton Riverside (London Waterloo, ~55 min direct) or Windsor & Eton Central (London Paddington via Slough). Both stations minutes from Alexandra Gardens.
Venue: Alexandra Gardens, Windsor, SL4 1RF, Berkshire, England. Date: Sunday 14 June 2026. Start times: Sprint + Sprint Relay: 06:00 · Standard + Standard Relay: 07:00 · Race ends 11:45. 35th anniversary (est. 1991). Distances: Standard (Olympic): 1,500m swim / 40km bike D+243m / 10km run D+85m · Sprint: 750m swim / 22km bike D+127m / 5km run D+51m. Course: River Thames open water swim (Queen Elizabeth Bridge, Baths Island) → Windsor Castle road cycle → Berkshire countryside → Windsor Great Park + Long Walk finish. Terrain: Swim open water (river current) · Bike road (open roads) · Run road/park. Min age: Standard 17 yrs · Sprint 15 yrs. Participants: ~3,000–3,500. Entries: Sold out. Presenting sponsor: Sigma Sports. Charity partner: Macmillan Cancer Support (100+ years supporting people with cancer). Organised by: RunThrough (Official Event Delivery Partner). Notable alumni: Jonny Wilkinson · Jenson Button · Gareth Thomas · Tanni Gray-Thompson · Princess Beatrice. Transport: Windsor & Eton Riverside (London Waterloo direct, ~55 min) · Windsor & Eton Central (London Paddington via Slough) · Both stations minutes from venue. Sustainability: RunThrough sustainability programme active.
All Events at a Glance
| Event | Distances | Start · Min Age · Notes |
|---|
| Standard Triathlon OLYMPIC | 1,500m · 40km · 10km | 07:00 · Age 17+ · D+243m bike |
| Sprint Triathlon SPRINT | 750m · 22km · 5km | 06:00 · Age 15+ · D+127m bike |
| Standard Relay RELAY | 3-person team · Olympic | 07:00 · From £135 early bird |
| Sprint Relay RELAY | 3-person team · Sprint | 06:00 |
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👑 35th ANNIVERSARY Windsor · River Thames · Windsor Castle · Long Walk · Great Park · Sigma Sports · Macmillan · RunThrough · SL4 1RF
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Triathlon shoes & gear — i-Run
From the River Thames open water swim to a rolling 40km road bike through the Berkshire countryside and a final run along the Long Walk — the Royal Windsor Triathlon demands quality triathlon kit. Asics, Hoka, New Balance or Brooks for the run — i-Run, the running and multisport specialist. International shipping.
Shop i-Run →
![trail campagne[94]](/getfile.php/5496446.1046.mz7ltazwuttatm/trail+campagne%5B94%5D.jpg)