Castle Triathlon Series 2021

We are delighted to be the exclusive charity partner for Castle Triathlon Series 2021.

Sign up to a unique and beautiful race at one of four UK castles. You can also take a trip over to our neighbours in Ireland or France and make a weekend of it. Whatever your ability, the Series offers triathlons, runs and swims for all levels. All this will take place in a friendly festival atmosphere, making it a race to remember.

Join Team Macmillan for free today to be part of something special and raise money to help those living with cancer live life as fully as they can.

Where will your challenge take you?

Questions about getting involved?

Contact our Triathlon Team at