Royal Windsor Triathlon June 2027

Join Us for the Royal Windsor TriathlonRoyal Windsor Triathlon on Sunday 13th June 2027

In support of Macmillan Cancer Support

We’re delighted to have Macmillan as our RunThrough Triathlon Partner in 2027. Macmillan has spent more than 100 years helping people living with cancer. From the moment someone is diagnosed, we're there with all the information, support and guidance they need, to help everyone with cancer live life as fully as they can.

Start your summer strong at one of the UK's most iconic multisport events the Royal Windsor Triathlon returns on Sunday 13th June 2027! 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. 

Ticket Selling

Super Early Bird entry - Ends Sunday 2nd August 2026

Early Bird entry - Ends Sunday 13th December 2026

Standard entry - Ends Sunday 16th May 2027

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

Each kilometre is accurately marked with distance flags and our friendly marshals will guide and cheer you all the way to the finish. We cannot wait to welcome you to the Royal Windsor Triathlon Presented by Sigma Sports.

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.

You can now grab your Royal Windsor Triathlon Presented by Sigma Sports event t-shirt for more than 30% off when you buy it as part of your entry on checkout! With the event logo printed on the chest, it’s the perfect keepsake to celebrate your race and wear your achievement with pride!

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.

Come and enjoy the day with us. Once you enter you will receive a confirmation email. More information will be sent closer to the event.

We can’t wait to see you on the start line!