The Haywards Heath Lions Club's Swimarathon is an annual charity fundraising event held at the Dolphin Leisure Centre on Good Friday.
The Swimarathon enables teams of six swimmers of any age to raise money for  The Haywards Heath Lions Club's chosen good cause and a  local good cause of their own choice or for Haywards Heath Lions Club's Charitable Trust. The sponsorship money raised by each team is paid to Haywards Heath Lions Club, who then distribute it to the charities and good causes.
The key objective is to raise as much money as possible while having fun!
 For 2023, the Lions have chosen to support West Sussex Mind.