Royal Windsor Triathlon June 2026

Join Us for the Royal Windsor Triathlon on Sunday 14th June 2026 and celebrate our 35 Year Anniversary! 

Start your summer strong at one of the UK's most iconic multisport events the Royal Windsor Triathlon returns on Sunday 14th June 2026! With Sprint, Standard, and Relay options available, this award-winning race is perfect for triathletes of all abilities.

The day begins with an open water swim in the River Thames keep an eye out for swans! Next, take on a thrilling road cycle through the historic town of Windsor, passing Windsor Castle and heading into the scenic countryside. You’ll finish with a memorable run into Windsor Great Park, along the iconic Long Walk, with the castle framing your final strides.

Whether you’re going solo or teaming up for the relay, the Royal Windsor Triathlon is a must do event with a royal backdrop and a buzzing race village atmosphere.

The Royal Windsor Triathlon is operated by RunThrough as the Official Event Delivery Partner. 

Race Distances:

Sprint Triathlon

750m swim, 20km bike and 5km run

Standard Triathlon

1500m swim, 40km bike and 10km run

Start Times:

06:00 am - Sprint Triathlon

Bike: Elevation - 127m | Terrain - Road

Run: Elevation - 51m | Terrain - Road

07:00 am - Standard Triathlon

Bike: Elevation - 243m | Terrain - Road

Run: Elevation - 85m | Terrain - Road

Race day pass is not included in the above entry fee and needs to be bought at checkout

Relay races are open only to teams of 3 participants 

Relay Ticket Inc T-shirt (+£12 Each)

Included in the entry

Unique Themed Medal

Free Race Photos

Chip-Timed Results

Awarded BTF's 'Event of the Year' an incredible seven times, this legendary triathlon continues to draw thousands each year with its quality, location, and unforgettable course.

*Please note: BTF Race day pass is not included in the entry and needs to be purchased separately

Come and enjoy the day with us. We hope to see you there!

With RunThrough you can expect a friendly team of marshals to help guide you round the course and cheer you on to the finish, a lively and well-serviced event village with plenty of food and drink options including free goodies from our partners at the finish line after your hard effort.

We have been extensively researching what runners consider important, and sustainability is fast becoming the top issue. Click here to see what RunThrough is doing for sustainability.

T-Shirts at events have become a hot topic with concerns around the quality not being high enough to wear on a regular basis. We have decided to tackle this by offering a RunThrough Kit Technical T-Shirt with a retail value of £22 for £12 with the addition of the Royal Windsor Triathlon event logo printed on the chest.

We can do this with our partner RT Kit as part of a strategic decision to raise awareness about the quality of the product whilst reducing the overall cost of events for those who would prefer not to have a t-shirt included.