We’re delighted to have Macmillan as our RunThrough Triathlon Partner in 2026. 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.

This is a unique chance to complete a swim, bike, run around the theme park. With ‘sprint’ distances, it makes it the perfect event for beginners keen to try the triathlon format.

The swim is 1 x 750m lap of the buoy-marked course in Fleet Lake featuring 6 sighting buoys while the bike and run courses are 20km and 5km respectively, with both routes being very flat. Whether you’re a first-timer to this format or keen to shave some seconds off a personal best, this course is perfect.

Signing up to this event hosted by RunThrough you can expect that each discipline will be accurately marked out with distance flags and there will be plenty of marshals helping to keep you on track and cheer you all the way to the finish. Entry to this event also includes FREE entry into Thorpe Park Theme Park!