The Haywards Heath Lions Club's Swimarathon is an annual charity fundraising event held at the Dolphin Leisure Centre on Good Friday, enabling teams of six swimmers of any age to raise money for local charities and good causes.

The main beneficiary of this year’s swimarathon will be The Rockinghorse Children’s Charity project for the Sensory Ward at Chalkhill Hospital in Haywards Heath, who will receive 50 % of all money raised.